Toilets in Japan
Some toilets in Japan are more elaborate than toilets commonly found in other developed nations. The current state of the art for Western-style toilets in Japan is the bidet toilet, which, as of March 2016, is installed in 81% of Japanese households. In Japan, these bidets are commonly called washlets, a brand name of Toto Ltd., and include many advanced features rarely seen outside of Asia. The feature set commonly found on washlets are anal hygiene, bidet washing, seat warming, and deodorization. Japanese toilets are well known in popular culture and often parodied in comedic works set in Japan.
- 1 Terminology
- 2 Types of toilets
- 3 Urinals
- 4 Japan-specific accessories
- 5 Public toilets
- 6 Cultural aspects
- 7 Environmental aspects
- 8 Economy
- 9 History
- 10 See also
- 11 References
- 12 External links
A common euphemism is otearai (お手洗い, lit. hand-washing). This is similar to the usage in US English of "washroom", which literally means a room where something is washed, and "toilet", which literally refers to the act of self-cleaning. (However, in Canada, “washroom” is equivalent to US “restroom.”) It is also common to see another loan translation, keshōshitsu (化粧室, lit. powder room), on signs in department stores and supermarkets, as well as accompanying the public toilet pictogram.
The plain word for toilet is benjo (便所, place of convenience or place of excrement), from the word ben (便) meaning "convenience" or "excrement", and this word is fairly common. It is often used in elementary schools, public swimming baths, and other such public places, and is not especially impolite, although some may prefer to use a more refined word. In many children's games, a child who is tagged "out" is sent to a special place, such as the middle of a circle, called the benjo. Japanese has many other words for places reserved for excretory functions, including kawaya (厠) and habakari (憚り), but most are rare or archaic.
The toilet itself—that is, the bowl or in-floor receptacle, the water tank, et cetera—is called benki (便器). The toilet seat is benza (便座). A potty, either for small children or for the elderly or infirm, is called omaru (sometimes written 御虎子).
The Japan Toilet Association celebrates an unofficial Toilet Day on November 10, because in Japan the numbers 11/10 (for the month and the day) can be read as ii-to(ire), which also means "Good Toilet".
Types of toilets
There are two styles of toilets commonly found in Japan; the oldest type is a simple squat toilet, which is still common in public conveniences. After World War II, modern Western-type flush toilets and urinals became common.
The traditional Japanese-style (和式, washiki) toilet is a squat toilet—also known as the 'Asian Toilet,' as squat toilets of somewhat similar design are common all over Asia. A squat toilet differs from a Western toilet in both construction and method of employment. A squat toilet essentially looks like a miniature urinal set horizontally into the floor. Most squat toilets in Japan are made of porcelain, although in some cases (as on trains) stainless steel is used instead. The user squats over the toilet, facing the hemispherical hood, i.e., the wall in the back of the toilet in the picture seen on the right.[dead link] A shallow trough collects the waste, instead of a large water-filled bowl as in a Western toilet. All other fixtures, such as the water tank, piping, and flushing mechanism, may be identical to those of a Western toilet. Flushing causes water to push the waste matter from the trough into a collecting reservoir which is then emptied, with the waste carried off into the sewer system. The flush is often operated in the same manner as a Western toilet, though some have pull handles or pedals instead. Many Japanese toilets have two kinds of flush: "small" (小) and "large" (大). The difference is in the amount of water used. The former is for urine (in Japanese, literally "small excretion") and the latter for feces ("large excretion"). The lever is often pushed to the "small" setting to provide a continuous covering noise for privacy, as discussed below.
A combination squat/Western toilet also exists, where a seat can be flipped down over a squat toilet, and the toilet can be used essentially the same way as the Western style. This hybrid seems to be common only in rural areas for the benefit of resident foreigners. Adapters that sit on top of the Japanese toilet to convert it to a functional sit-down toilet are much more common. There are also permanently installed extensions available to convert a squat toilet into a Western-style washlet.
There is a trend in Japan since the 1960s to replace squat toilets at schools and public places with sitting toilets. This trend is thought to accelerate in the run-up to the 2020 Tokyo Olympics and Paralympics.
A flush toilet which has a pedestal for sitting is known in Japan as a Western-style (洋式 yōshiki) toilet. Western-style toilets, including high tech toilets, are now more common in Japanese homes than the traditional squat toilets, though some older apartments retain stickers on the toilet or in its room illustrating the proper way to use it for urination and defecation. Many public toilets at schools, temples, and train stations are still equipped with only squat toilets. In their own homes, however, Japanese people prefer being able to sit, especially older or physically disabled individuals for whom prolonged squatting is physically demanding or uncomfortable.
The modern toilet in Japan, in English sometimes called Super Toilet, and commonly known in Japanese as Washlet (ウォシュレット Woshuretto) or as warm-water cleaning toilet seat (温水洗浄便座 onsui senjō benza) is one of the most advanced types of toilet worldwide, showing a dazzling array of features. The Toto product Washlet Zoe is listed in Guinness World Records as the world's most sophisticated toilet, with seven functions. However, as the model was introduced in 1997, it is now likely to be inferior to the latest model by Toto, Neorest. The idea for the washlet came from abroad, and the first toilet seat with integrated bidet was produced in Switzerland by Closomat in 1957. The age of the high-tech toilet in Japan started in 1980 with the introduction of the Washlet G Series by Toto, and since then the product name washlet has been used to refer to all types of Japanese high-tech toilets. As of 2002, almost half of all private homes in Japan have such a toilet, exceeding the number of households with a personal computer. While the toilet looks like a Western-style toilet at first glance, there are numerous additional features—such as blow dryer, seat heating, massage options, water jet adjustments, automatic lid opening, automatic flushing, wireless control panel, room heating and air conditioning for the room—included either as part of the toilet or in the seat. These features can be accessed by an (often wireless) control panel attached to the seat or mounted on a nearby wall.
The most basic feature is the integrated bidet, a nozzle the size of a pencil that comes out from underneath the toilet seat and squirts water. It has two settings: one for washing the anus and one for the bidet. The former is called posterior wash, general use, or family cleaning, and the latter is known as feminine cleaning, feminine wash or simply bidet. At no point does the nozzle actually touch the body of the user. The nozzle is also self-cleaning and cleans itself before and after operation. The user can select to wash the anus or vulva by pressing the corresponding button on the control panel. Usually the same nozzle is used for both operations, but at a different position of the nozzle head, and using different openings in the nozzle to squirt water at a different angle to aim for the correct spot. Occasionally, two nozzles are used, each dedicated for one area. The control logic is also attached to a pressure switch or a proximity sensor in the toilet seat, and operates only when the seat is occupied. The very first models did not include this automatic switch-off.
The seat-heating feature is very common, found even on toilets that lack the bidet features. As most Japanese homes lack central heating – instead using space heating – the bathroom may be only a few degrees above freezing in the winter.
Most high-tech toilets allow water temperature and water pressure to be adjusted to match the preferences of the user. By default, the vulva receives less pressure than the anus. Researchers in Japan have found that most users prefer a water temperature slightly above body temperature, with 38 °C (100 °F) considered optimal. The nozzle position can also often be manually adjusted forward or aft. High-end washlets allow selection of vibrating and pulsating jets of water, claimed by manufacturers to be beneficial for constipation and hemorrhoids. The most advanced washlets can mix the water jet with soap for an improved cleaning process.
The washlet can replace toilet paper completely, but many users opt to use both wash and paper in combination—although use of paper may be omitted for cleaning of the vulva. Some wipe before washing, some wash before wiping, some wash only, and some wipe only—each according to his/her preference. Another frequent feature is a blow dryer, often adjustable between 40 °C and 60 °C, used to dry the washed areas.
Other features may include a heated seat, which may be adjustable from 30 °C to 40 °C; an automatic lid equipped with a proximity sensor, which opens and closes based on the location of the user; and an air dryer and deodorizer. Some play music to relax the user's sphincter (some Inax toilets, for example, play the first few phrases of Op. 62 Nr. 6 Frühlingslied by Felix Mendelssohn). Other features are automatic flushing, automatic air deodorizing, and a germ-resistant surface. Some models specially designed for the elderly may include armrests and devices that help the user to stand back up after use. A soft close feature slows the toilet lid down while closing so the lid does not slam onto the seat, or in some models, the toilet lid will close automatically a certain time after flushing. The most recent introduction is the ozone deodorant system that can quickly eliminate smells. Also, the latest models store the times when the toilet is used and have a power-saving mode that warms the toilet seat only during times when the toilet is likely to be used based on historic usage patterns. Some toilets also glow in the dark or may even have air conditioning below the rim for hot summer days. Another recent innovation is intelligent sensors that detect someone standing in front of the toilet and initiate an automatic raising of the lid (if the person is facing away from the toilet) or the lid and seat together (if someone is facing the toilet).
Text explaining the controls of these toilets tends to be in Japanese only. Although many of the buttons often have pictograms, the flush button is often written only in Kanji, meaning that non-Japanese users may initially find it difficult to locate the correct button.
In January 2017, The Japan Sanitary Equipment Industry Association, a consortium of companies producing plumbing products including Toto Ltd., Panasonic, and Toshiba, has agreed to unify the iconography used on the often baffling control panels for Japanese toilets. The toilet manufacturers plan to implement the eight new pictogram on models released from this year onward, with a view to the system becoming an international standard.
Recently, researchers have added medical sensors into these toilets, which can measure the blood sugar based on the urine, and also measure the pulse, blood pressure, and the body fat content of the user. Talking toilets that greet the user have also started being made. Other measurements are currently being researched. The data may automatically be sent to a doctor through a built-in internet-capable cellular telephone. However, these devices are still very rare in Japan, and their future commercial success is difficult to predict. A voice-operated toilet that understands verbal commands is under development. TOTO, NAiS (a division of Panasonic), and other companies also produce portable, battery-operated travel washlets, which must be filled with warm water before use.
The repetitive use of a "type water jet on a high-pressure setting for an enema, can weaken the capability for self-evacuation of the Washlet user, which can lead to more serious constipation." If a Washlet high-pressure water jet is used on the anus repeatedly, it may cause excessive cleanliness, prompting other bacteria to adhere around the anus, causing skin disease (inflammation) around the anus. Some proctologists in Japan have named this "Washlet Syndrome" (ウォシュレット症候群 woshuretto shoukougun) or "Warm-water toilet seat Syndrome" (温水便座症候群 on-sui ben-za shoukougun). 
Urinals in Japan are very similar to the urinals in the rest of the world, and mainly used for public male toilets or male toilets with a large number of users. They often are, however, mounted lower compared to urinals in the West.
Female urinals never caught on in Japan, although there were attempts made to popularize the American Sanistand female urinal by the Japanese toilet manufacturing company Toto between 1951 and 1968. This device was shaped like a cone and placed on the floor. However, those were never very popular, and only a few of them remain, including those underneath the now demolished National Olympic Stadium from the 1964 Summer Olympics in Tokyo, which was added to accommodate people from a wide range of cultures.
Toilets in Japan have very similar accessories as most toilets worldwide, including toilet paper, a toilet brush, a sink, etc. However, there are some Japan-specific accessories that are rarely found outside Japan.
The Sound Princess
Many Japanese women are embarrassed at the thought of being heard by others during urination (see paruresis). To cover the sound of bodily functions, many women used to flush public toilets continuously while using them, wasting a large amount of water in the process. As education campaigns did not stop this practice, a device was introduced in the 1980s that, after activation, produces the sound of flushing water without the need for actual flushing. A Toto brand name commonly found is the Otohime (音姫, lit. "Sound Princess," also homophone with a legendary goddess Otohime). This device is now routinely placed in most new public women's rooms, and many older public women's rooms have been upgraded. The Otohime may be either a separate battery-operated device attached to the wall of the toilet, or included in an existing washlet. The device is activated by pressing a button, or by the wave of a hand in front of a motion sensor. When activated, the device creates a loud flushing sound similar to a toilet being flushed. This sound either stops after a preset time or can be halted through a second press on the button. It is estimated that this saves up to 20 litres (4.4 imp gal; 5.3 US gal) of water per use. However, some women believe that the Otohime sounds artificial and prefer to use a continuous flushing of the toilet instead of the recorded flush of the Otohime.
In Japanese culture, there is a tendency to separate areas into clean and unclean, and the contact between these areas is minimized. For example, the inside of the house is considered a clean area, whereas the outside of the house is considered unclean. To keep the two areas separated, shoes are taken off before entering the house so that the unclean shoes do not touch the clean area inside of the house. Historically, toilets were located outside of the house, and shoes were worn for a trip to the toilet. Nowadays, the toilet is almost always inside the home and hygienic conditions have improved significantly, but the toilet is still considered an unclean area. To minimize contact between the unclean toilet floor and the clean floor in the rest of the house, many private homes and also some public toilets have toilet slippers (トイレスリッパ toire surippa) in front of the toilet door that should be used when in the toilet and removed immediately after leaving the toilet. This also indicates if the toilet is in use. They can be as simple as a pair of rubber slippers, decorated slippers with prints of anime characters for small children, or even animal fur slippers. A frequent faux pas of foreigners is to forget to take off the toilet slippers after a visit to the restroom, and then use these in the non-toilet areas, hence mixing the clean and unclean areas.
Public toilets are usually readily available all over Japan, and can be found in department stores, supermarkets, book stores, CD shops, parks, most convenience stores, and in all but the most rural train stations. Some older public toilet buildings lack doors, meaning that men using the urinals are in full view of people walking past. Beginning in the 1990s, there has been a movement to make public toilets cleaner and more hospitable than they had been in the past.
The number of public restrooms that have both Western and squat types of toilets is increasing. Many train stations in the Tokyo area and public schools throughout Japan, for example, only have squat toilets. In addition, parks, temples, traditional Japanese restaurants, and older buildings typically only have squat toilets. Western-style toilets are usually indicated by the kanji characters 洋式 (yōshiki), the English words "Western-style", a symbol for the type of toilet, or any combination of the three. Handicapped bathrooms are always Western style.
Many public toilets do not have soap for washing hands, or towels for drying hands. Many people carry a handkerchief with them for such occasions, and some even carry soap. Some public toilets are fitted with powerful hand dryers to reduce the volume of waste generated from paper towels. Hand dryers and taps are sometimes installed with motion-sensors as an additional resource-saving measure.
In Japan, cleanliness is very important, and some Japanese words for 'clean' can be used to describe beauty. The word kirei (きれい, 綺麗) can be defined as "pretty, beautiful; clean; pure; orderly." This may explain the success of the high-tech toilet with a built-in bidet. There is also a large market for deodorants and air fresheners that add a pleasant scent to the area.
In the often crowded living conditions of Japanese cities and with the lack of rooms that can be locked from inside in a traditional Japanese house, the toilet is one of the few rooms in the house that allows for privacy. Some toilet rooms are equipped with a bookshelf, in others people may enter with a newspaper, and some are even filled with character goods and posters. Even so, these toilets are, whenever possible, in rooms separate from those for bathing. This is due to the ethic in separating clean from unclean, and this fact is a selling point in properties for rent.
Both the traditional squat toilet and the high-tech toilet are a source of confusion for foreigners unaccustomed to these devices. There are humorous reports of individuals using a toilet, and randomly pressing buttons on the control panel either out of curiosity or in search for the flushing control, and suddenly to their horror receiving a jet of water directed at the genitals or anus. As the water jet continues for a few seconds after he jumps up, he also gets himself or the bathroom wet.[dead link] Many Japanese toilets now feature pressure sensitive seats that automatically shut off the bidet when the user arises. Many have the buttons labeled in English to reduce culture shock.
In January 2017, the Japan Sanitary Equipment Industry Association agreed to standardize the iconography used on control panels of Japanese toilets, in an attempt to reduce confusion of foreign visitors.
The environmental impact of modern style washlets differs from regular flush toilets. Modern toilets use less water than old toilets, and the self-cleaning options also reduce the amount of detergent. Some toilets even change the amount of water for the flush depending if the seat was flipped up (indicating male urination) or not. They also cause less toilet paper to be used. On the other hand, these toilets also consume energy, and are estimated to consume 5% of the energy of the average Japanese household. In rural areas, toilets that use very little or no water have also been designed. These are also considered as emergency toilets in case of earthquakes.[dead link]
Washlets in Japan cost from US$200, with the majority priced around US$500 for washlet upgrades for existing Western-style toilets. Top-of-the-range washlets, including the ceramic bowl, can easily cost up to US$5,000.
The total market worldwide for high-tech toilets was about US$800 million in 1997. The largest producer is Toto, with 65% of the market share, while the second largest is Inax at 25%. The main market for washlets is still in Japan, and TOTO reports that overseas sales account for just 5% of its revenue. The primary foreign market is China, where Toto sells over one million washlets each year. In the US for example, sales are well below Japanese levels, even though sales improved from 600 units per month in 2001 to 1,000 units per month in 2003. In Europe, Toto sells only 5,000 washlets annually. While most Europeans would probably regard Japanese washlets as quite a curiosity, the number of such toilets being installed in Europe is increasing. This is mainly for toilets for the handicapped. Depending on the type of disability, handicapped persons may have difficulties reaching the anus region to clean themselves after toilet use. Hence, the introduction of toilets with a water jet cleaner and blow dryer allows such persons to clean themselves without assistance.
There are several reasons for low sales outside of Japan. One main reason is that it takes time for customers to get used to the idea of a washlet. Sales in Japan were slow when the device was introduced in 1980. After some acclimatization, sales improved significantly starting in 1985. Around 1990, 10% of Japanese households had a washlet; this number increased to over 50% in 2002. Toto expects a corresponding improvement in foreign sales within a few years. Another reason is the lack of a power supply near the toilet. While virtually all Japanese washrooms have an electric outlet behind the toilet, many foreign bathrooms lack a nearby outlet. In Australia, New Zealand, Ireland, the UK, and many other countries, high current electrical outlets installed in close proximity to water, or where persons may be wet, are prohibited by codes due to health and safety reasons. Finally the outlet of the toilet (for S-type toilets) is max. 10 ~ 15 cm from back wall but Japanese toilets need it to be at least 30 cm so a S-type European toilet cannot be replaced easily with a Japanese toilet. They are much more expensive than traditional Western toilets. In Europe, there is competition of the traditional Western bidet, while North Americans are unaccustomed to bidets.
During the Jōmon period (1400 B.C. to 300 B.C.) settlements were built in a horseshoe shape, with a central plaza in the middle and garbage heaps around the settlement. In these garbage heaps, calcified fecal remains of humans or dogs, so called coprolites, were found, indicating that these garbage dumps were also used as toilets.
A possible ritual site, that may also have been a toilet using flowing water, dating back to the early 3rd century was found in Sakurai, Nara. Another cesspit analyzed by archaeologists in detail was found at the site of the Fujiwara Palace in Kashihara, Nara, the first location of the imperial city from 694 to 710. This toilet was constructed over an open pit similar to an outhouse.
During the Nara period (710 to 784), a drainage system was created in the capital in Nara, consisting of 10–15 cm wide streams where the user could squat over with one foot on each side of the stream. Wooden sticks called chūgi were used as a sort of toilet paper. In earlier days seaweed was used for cleaning, but by the Edo period, these had been replaced by toilet paper made of washi (traditional Japanese paper). In the mountainous regions, wooden scrapers and large leaves were used too.
Often, toilets were constructed over a running stream; one of the first known flushing toilets was found at Akita castle, dating back to the 8th century, with the toilet constructed over a diverted stream.
However, historically, pit toilets were more common, as they were easier to build and allowed the reuse of the feces as fertilizer—very important in a country where Buddhism and its associated mostly vegetarian, pescetarian lifestyle acted to reduce dependence on livestock for food. The waste products of rich people were sold at higher prices because their diet was better.
Various historic documents dating from the 9th century describe laws regarding the construction of fresh and waste water channels, and detail the disposal procedures for toilet waste.
- Prisoners shall be directed to clean up sewage at the Palace and government offices as well as toilets of the east and west on the morning after a rainy night
(Collected Interpretations of the Administrative Laws Ryo-no-shuge)
Selling human waste products as fertilizers became much less common after World War II, both for sanitary reasons and because of the proliferation of chemical fertilizers, and less than 1% is now used for fertilization. Because of this history, Japan had a much higher historical standard of hygiene. For example, in Japan, the orderly disposal of human waste was common. The first Westerner to visit Edo expressed his shock to see such a clean city.
In Okinawa, the toilet was often attached to the pig pen, and the pigs were fed with the human waste product. This practice was banned as unhygienic after World War II by the American authorities.
During the Azuchi–Momoyama period (1568 to 1600), the "Taiko Sewerage" was built around Osaka Castle, and it still exists and functions today. The use of modern sewage systems began in 1884, with the installation of the first brick and ceramic sewer in Kanda, Tokyo. More plumbing and sewage systems were installed after the Great Kantō earthquake to avoid diseases after future earthquakes. However, the construction of sewers increased only after World War II to cope with the waste products of the growing population centers. By the year 2000, 60% of the population was connected to a sewer system. The national Sewage Day is September 10.
Western-style toilets and urinals started to appear in Japan at the beginning of the 20th century, but only after World War II did their use become more widespread, due to the influence of the American occupation. The Occupation government eschewed the use of human excreta as fertilizer, which led to a sense of shame over this practice, and in rural areas where the practice had persisted, human waste quickly went from being recycled to being disposed of. Specific places where night soil continued to be recycled required conscious political leadership, such as the Shinkyō Commune in Nara Prefecture.
In 1977, the sale of Western-style toilets exceeded the sale of traditional squat toilets in Japan. Based on toilets with a built-in bidet from Switzerland and the US, the world's largest sanitary equipment company, TOTO, introduced the Washlet in 1980. Japanese companies currently produce some of the most advanced, high-tech toilets in the world.
- Science and technology in Japan
- Mariko Aoki phenomenon, the urge to defecate while visiting a bookstore
- TOTO Neorest 600
- TOTO Drake II
- "平成28年3月実施調査結果：消費動向調査" [March 2016 consumer spending survey]. Cabinet Office, Government of Japan. March 2016. Archived from the original on 2016-06-23.
- Ichikawa, Takashi (1998). sanseidōgendaishinkokugojiten 三省堂現代新国語辞典 [Sanseidō New Modern Dictionary]. Tokyo, Japan: Sanseido Co., Ltd. ISBN 4-385-14034-0.
- "The Japanese Toilet". The Japanese Page. May 2001. Retrieved 2006-11-07.
- "List about toilet". Archived from the original on 2006-08-30. Retrieved 2006-11-07.
- "Japan Toilet association" (in Japanese). Retrieved 2006-11-07.[unreliable source?]
- "Japanese toilets". Japan-Guide.com. Retrieved 16 August 2015.
- [dead link] "How to use Japanese style toilet". Retrieved 2006-11-08.
- Julie Parsons (1995). ""You call this a toilet?!" And Other Oddities of Japanese Housing". Iwate Pre-Departure Handbook. Archived from the original on 2012-04-16. Retrieved 2006-11-08.
- "Japan Phasing Out Squat Toilets". Nippon.com. 8 January 2019. Retrieved 13 February 2018.
- Brooke, James (October 8, 2002). "Nara Journal; Japanese Masters Get Closer to the Toilet Nirvana". The New York Times. Retrieved 2010-04-09.
- Alan Bellows (January 2, 2006). "Modern Movements in Toilet Technology". Damn Interesting. Retrieved 2006-11-08.
- Reuters, Tokyo, Chris (September 28, 2003). "US, Europe unready for super-toilets, but Japan is patient". Taipei Times. Retrieved 2006-11-08.CS1 maint: multiple names: authors list (link)
- "High-Tech Toilets". Web Japan. archive
- Mary Jordan; Kevin Sullivan (May 15, 1997). "But Do They Flush? Japan's High-Tech Toilets Do Nearly Everything, Even Redden Faces". The Washington Post. Retrieved 2006-11-07.
- Robinson, Melia (June 1, 2017). "I tried the 'Mercedes Benz of toilets' that comes with a remote control and costs $10,200". Business Insider. Retrieved 23 November 2017.
- Magnier, Mark. "Japan Is Flush With Obsession". Los Angeles Times. Retrieved 3 May 2016.
- Sara Ito, "Toto Neorest 700H", Terrific Toilets, 02 May 2018
- Fitzpatrick, M. (May 14, 1998). "Japanese offer the world hi-tech toilet training". Daily Telegraph. pp. 8–9.
- Sam Byford (17 January 2017). "Japanese toilet industry agrees to standardize complex bidet controls". The Verge. Retrieved 18 January 2017.
- Hudson Hongo (18 January 2017). "Japanese Toilet Makers Agree to Simplify Control Buttons for Confused Foreigners". GIZMODO. Retrieved 18 January 2017.
- "Japan's hi-tech toilets to get standardised symbols". BBC. 18 January 2017. Retrieved 18 January 2017.
- "医師に聞く！ウォシュレットの正しい使い方 (Ishi ni kiku! Woshuretto no tadashii tsukaikata)" [Question for the doctor about right usage of Washlet] (in Japanese). Retrieved 2008-06-28.
- 藤家クリニック (肛門科) - おしりにやさしく - ウォシュレットをお持ちの方へ [Fujiie Clinic (Proctology) - Take care of the hips tenderly - For the "Washlet" users] (in Japanese). Archived from the original on 2012-02-20. Retrieved 2008-06-28.
- [dead link] "洪クリニック (肛門科) - よくあるご質問 - Q.3 普段の生活で何か気をつけることはありますか" [Koh Clinic (Proctology) - F.A.Q. - Question No.3 What about notice on usual life of patient] (in Japanese). Archived from the original on May 11, 2009. Retrieved 2008-06-28.
- Sapa (October 4, 2004). "Sound Princess eliminates toilet noises". IOL. Archived from the original (http) on March 21, 2007. Retrieved 2006-11-05.
- "A Hit with Self-Conscious Women". Web Japan. Retrieved 2009-11-21.
- "Japanese customs for foreigners - part 1: toilet slippers". Genki Japanese and Culture School. Retrieved 2006-11-13.
- Doug Jardine (September 5, 2006). "What's with toilet slippers?". Archived from the original on January 8, 2009. Retrieved 2006-11-13.
- Anne R. LaVin. "Origami Tanteidan Convention - The Gaijin Guide: Weather & Clothing". Retrieved 2006-11-13.
- Eaton, Breawna (13 July 2013). "Japanese-style toilets can be challenge for visitors". Japan Today. Retrieved 2 August 2016.
- Gregg Mann. "Tokyo Apartments". Retrieved 2006-11-13.
Lim Tai Wei (2002). "A Study of Japanese Toilets". World Toilet Organization. Archived from the original on September 25, 2006. Retrieved 2006-11-07. Cite journal requires
- Sam Byford. "Japanese toilet industry agrees to standardize complex bidet controls". Retrieved 2017-01-19.
- Yamanouchi, Daisuke (2001). Reducing Environmental Problems Caused by Domestic Water Consumption (2nd International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign'01) ed.). p. 65.
"How Life Cycle Assessment (LCA) can enhance the Fight against Global Warming (Research Report No. 45)" (PDF). Development Bank of Japan, Economic and Industrial Research Department. August 2004. Retrieved 2011-07-30. Cite journal requires
- [dead link] Saiko Sakamoto; Atsuhiro Katsumata. "The Next Generation Toilet And Its Maintenance" (PDF). Japan Toilet Association Maintenance Study Institute. Archived from the original (PDF) on 2006-01-12. Retrieved 2006-11-13.
- Smart Toilets Arrive in U.S. - WSJ
- George, Rose (29 August 2008). "Japan's hi-tech toilets". The Daily Telegraph. London.
- Matsui, Akira; Masaaki Kanehara, Masako Kanehara (2003). "Palaeoparasitology in Japan - Discovery of toilet features" (PDF). Memórias do Instituto Oswaldo Cruz. Rio de Janeiro: Memórias do Instituto Oswaldo Cruz. 98 (1): 127–136. doi:10.1590/S0074-02762003000900019. ISSN 0074-0276. Retrieved 2006-11-05.
- "Sewer History: Photos and Graphics: Japan". Retrieved 2006-10-30.
- "Making Great Breakthroughs: All about the Sewage Works in Japan". Japan Sewage Works Association. c. 2002. p. 47. Retrieved 2006-10-30.
- "Invitation: The Heijo Palace Site Museum" (PDF). p. 16. Retrieved 2006-10-30.
- Pietzcker, Eva (2004). "Japanese Papermaking - Kami-suki". Druckstelle Berlin. Retrieved 2006-10-30.
- "The History of Toilets in Japan". Web Japan. Retrieved 2009-08-05.
- Masao Ukita & Hiroshi Nakanishi (1999). "Pollutant Load Analysis for the Environmental Management of Enclosed Sea in Japan" (PDF). p. 122. Archived from the original (PDF) on 2006-11-09. Retrieved 2006-10-30.
Junko Edahiro; Hiroyuki Tada (March 31, 2003). "Japans sustainable society in the Edo period (1603–1867)". Japan for Sustainability Newsletter #007. Japan for Sustainability. Archived from the original on 2008-07-20. Retrieved 2006-11-07. Cite journal requires
Keiichi Kato (December 2000). "Study on Okinawa's Development Experience in Public Health and Medical Sector". Institute for International Cooperation, Japan International Cooperation Agency. Archived from the original on 2009-04-22. Retrieved 2009-08-05. Cite journal requires
- "Tracking Down the Roots Chronology: Japan". Retrieved 2006-10-30.
- "Numazu's Newsletter" (PDF). 2006-08-15. p. 9. Archived from the original (PDF) on 2011-07-22. Retrieved 2006-10-30.
- Yoshie Sugihara; David W Plath (trans.) Sensei and his people; the building of a Japanese commune. Berkeley, University of California Press, 1969.
|Wikimedia Commons has media related to Toilets in Japan.|
- Article from The Japan Times Tokyo residents, foreigners on vacation, professors, and celebrities are interviewed about Japanese toilet use.
- Tokyo Toilet Map with pictures of public toilets in Japan.
- ToiletZone Picture of private toilets in Japan.
- Toilets in Tokyo
- Ito, Masami, "Toilets: Japan power behind throne", The Japan Times, 2 November 2010, p. 3.
- トイレットペーパーのポータルサイト｜トイレットペーパーの歴史 History of toilet paper at Toiletpaper.co.jp. Retrieved March 28, 2011. Japanese-language site.
- Toilet MP3 Akihabara News. Retrieved March 28, 2011.
- Japanese manners : Toilet Hokkaido Japanese Language School.