Riso Kagaku Corporation

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Riso Kagaku Corporation
Native name
Public KK
Traded as TYO: 6413
ISIN JP3974400008
Industry Electronics
Founded (September 2, 1946; 70 years ago (1946-09-02))
Founder Noboru Hayama
Headquarters Shiba, Minato-ku, Tokyo 108-8385, Japan
Area served
Key people
Akira Hayama
(President and CEO)

JPY 85.4 billion (FY 2015)

(US$ 762.5 million) (FY 2015)

JPY 5.2 billion (FY 2015)

(US$ 46.4 million) (FY 2015)
Number of employees
3,563 (as of March 31, 2016)
Website Official website
Footnotes / references

Riso Kagaku Corporation (理想科学工業株式会社?, Risō Kagaku Kōgyō Kabushiki-gaisha) is a Japanese corporation which is the inventor, manufacturer, and distributor of the RISO Printer-Duplicator, a.k.a. Risograph.

Established in Tokyo, Japan, Riso Kagaku is now a billion dollar company distributing product in over 150 countries. RISO Kagaku is maintaining a foundation that donates equipment around the world primarily to educational institutions.

In Japanese, 'Riso' means 'ideal' and the word 'Kagaku' means 'science.'

Noboru Hayama, the company's founder, started his business by mixing inks at his kitchen sink just after World War II, and in 1946 established a mimeograph printing company, whose first product was its signature duplicator.[3] Over the next few years, Mr. Hayama expanded his company to the area of manufactured emulsion inks, stencil masters, and other duplicating products.

Riso Kagaku Corporation also manufactures the world's fastest full color cut sheet inkjet printers (as of January 2011). The ComColor inkjet printer family is the third generation of production inkjet printers following the HC5500 and HC5000 product lines. ComColor printers print at speeds up to 150 pages per minute while consuming less than 1/2 the electricity of traditional toner-based (electrophotographic) printers and copiers.

See also[edit]


  1. ^ "Corporate Data". Riso Kagaku. Retrieved March 30, 2017. 
  2. ^ "Company Profile". Nikkei Asian Review. Nikkei Inc. Retrieved March 30, 2017. 
  3. ^ "RISO Africa opened its doors 21 years ago in July 1994 as a subsidiary of the Riso Kagaku Corporation of Japan". ITWeb. ITWeb Limited. January 8, 2016. Archived from the original on March 30, 2017. 

External links[edit]