|Type||Publicly Traded TYO: 8153|
|Founded||Tokyo, Japan (1972)|
|Founder(s)||Atsushi Sakurada (櫻田 厚 Sakurada Atsushi )|
Shinagawa, Tokyo, Japan
|Key people||Atsushi Sakurada, President and CEO|
|Products||Fast food, Finance, Sanitation|
|Revenue||60,009 million yen (March, 2010)|
|Employees||1,038 (March, 2010)|
MOS Food Services, Inc. (株式会社モスフードサービス Kabushiki-kaisha Mosu Fūdo Sābisu ), doing business as MOS Burger (モスバーガー Mosu bāgā ) (Japanese, "MOS" [mosɯ̥] or "Mountain Ocean Sun"), is a fast-food restaurant chain (fast-casual) that originated in Japan. It is now the second-largest fast-food franchise in Japan after McDonald's, and owns numerous overseas outlets over East Asia, including Taiwan, Singapore, Hong Kong, Thailand, Indonesia, Australia, South Korea and, until 2005, Hawaii. It is also the name of the standard hamburger offered by the restaurant, being its first product when it in 1972. Its headquarters are in the ThinkPark Tower in Ōsaki, Shinagawa, Tokyo. At one time its headquarters were in Shinjuku, Tokyo.
The publicly traded company runs 80^C stores, MOS's-C, Mother Leaf, Shanghalichiba, Mamedori, and Stefan Grill outlets. The company had 1,327 stores in 2005, down from 1,458 in 2001. One slogan used within its stores is "Japanese Fine Burger and Coffee".
Unique burgers 
MOS Rice Burger 
Rice was first used as a bun in 1987, when the restaurant served the Tsukune Rice Burger, filled with ground chicken and daikon, and seasoned with soy sauce. The Tsukune Rice Burger is no longer on the menu in Japan.
The MOS Rice Burgers currently include the 'kaisen kakiage rice burger' ('fresh seafood shrimp fritter rice burger'), the 'kinpira rice burger' ('fried burdock and carrot rice burger'), and the 'buta shōga yaki rice burger' ('grilled pork and ginger rice burger'). There used to be a 'yakiniku rice burger' ('grilled strips of beef rice burger') (available in Hong Kong, Singapore, Taiwan and Brisbane Australia branches).
The MOS Rice Burger has been imitated by the Taiwanese division of McDonalds, where the rice bun was pan-seared, but it remains a MOS-exclusive item in Japan and other markets.
Takumi Burger 
In 2003, MOS Burger introduced an ultra-premium Takumi Burger (meaning artisan taste) series, which was expanded further in 2004. The 'Nippon's Burger Takumi' hamburger was made with Tasmanian beef and ten toppings, including sliced avocado, grated wasabi, and other gourmet, seasonal ingredients. It was available for a limited time and cost 1,000 yen (9.14 Euros or 11.72 USD), making it one of the most expensive burgers offered by a fast-food chain. The 'Nippon's Burger Takumi Lettuce' was added in 2004, with lettuce instead of buns to sandwich the hamburger.
Former MOS headquarters, Shinjuku, Tokyo
- "Corporate Profile." MOS Burger. Retrieved on January 6, 2011. "Address of Headquarters 4F ThinkPark Tower, 2-1-1 Osaki, Shinagawa-ku, Tokyo 141-6004 JAPAN" - Address in Japanese: "〒141-6004 東京都品川区大崎2-1-1 ThinkPark Tower 4階 "
- "Outline." MOS Burger. April 17, 2001. Retrieved on January 6, 2011. "Headquarters 22, Tansu-machi, Shinjuku-ku, Tokyo 162-8501, Japan." Address in Japanese: "本社所在地 〒162-8501 東京都新宿区箪笥町22番地" Map in Japanese
- "Mos Burger Website - Australia Store Information". MOS Food Services, Inc. Retrieved March 29, 2013.
- Taipei Times
- Uranaka, Taiga (July 24, 2003). "Mos to woo consumers with higher prices". The Japan Times (English version, cached). Retrieved March 29, 2013.
- "Mos Food Services - Interview with the CEO". Mos Food Services. May 1, 2004. Retrieved March 29, 2013.