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- Founder Bunzo Tanuma opened a campus restaurant commissioned by Keio University (Noborito, Kawasaki City).

- The Original TONKATSU SABOTEN restaurant opened in the Tokyo-Shinjuku district.

- Bunzo Tanuma is appointed to be an executive director of the Food Service Association.

- Saboten Co., Ltd. was established with a capital of 30 million yen.

- Bunzo Tanuma is appointed to be the first chairman of the Japan Industrial Food Service Association.

- Bunzo Tanuma is elected to be a member of the Tokyo Chamber of Commerce and Industry.

- Bunzo Tanuma is awarded the Ranju Hosho (the Medal with a Blue Ribbon).

- Chiaki Tanuma joins Green House Co., Ltd.
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- Operating capital of Saboten Co., Ltd. grows to 60 million yen.

- Chiaki Tanuma becomes the president of Saboten Co., Ltd.
Bunzo Tanuma becomes the chairman of Saboten Co., Ltd.

- Saboten Co., Ltd. changes its name to Green House Foods Co., Ltd.

- Unified logotype is established for the Green House Group.

- Bunzo Tanuma is awarded the Order of the Rising Sun, Gold Rays with Rosette.
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- Operating capital of Green House Foods Co., Ltd. grows to 90 million yen.

- Bunzo Tanuma is awarded the Konju Hosho (The Medal with a Dark Navy Blue Ribbon).

- Bunzo Tanuma is appointed to be the chairman of the Japan Food Service Association.
Chiaki Tanuma becomes the president of Green House Co., Ltd.
Bunzo Tanuma becomes the chairman of Green House Co., Ltd.

- GreenHouse Co., Ltd acquires Shahoden Chinese restaurant.

- TONKATSU SABOTEN opens its 100th location.

- The Head Office is moved to Tokyo Opera City Tower in Hatsudai, Tokyo.
Saboten opens its 200th location.

- Saboten opens its 300th location.
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- The Head Office is moved to Shinjuku Park Tower in Shinjuku, Tokyo.

- Saboten opens its 400th location.
Technological partnership with "OUR HOME", a Korean company, is formed.
Saboten Restaurant opened the first location in Korea.

- Received ISO 14001 Certification.

- First Saboten Restaurant in Taiwan opens.

- Green House Foods Co., Ltd. celebrated its 40th anniversary.
Established joint venture Saboten Restaurant in Taiwan.

- First television commercial broadcast
A cooking class for children called Little Chef is organized.
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