History
Spatial design began for Tanseisha when our founder, WATANABE Masaji first started remodeling the interior of the newly bustling
department stores in Ueno, Tokyo after WWII.
For over seventy years since this humble origin, we have continued to hone our skills and creativity, expanding the field of the
general display industry through a multitude of achievements such as our pavilion at the Expo ’70 world fair held in Osaka, the
turning point of our company’s history.
When we moved our headquarters to Shinagawa, the doorway of Tokyo, we did so with the intention of it being “the gateway to
future design,” and we continue to create space for imaginations to grow while drawing power from our ability to read the times.
| October 1946 | Founded by WATANABE Masaji (Yanaka, Shitaya-ku). |
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| October 1949 | The original company name Sanko Co., Ltd. was established in Marunouchi,
Chiyoda Ward, Tokyo (later the trade name was officially changed to Nikki Co., Ltd.). |
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| December 1959 | Reincorporated under the current effective name TANSEISHA Co., Ltd.
Headquarters relocated to Kanda Tsukasamachi, Chiyoda Ward, Tokyo. |
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| November 1961 | Headquarters completed (Yushima, Bunkyo-ku). |
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| February 1964 | Osaka office established (currently the Kansai branch). |
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| September 1966 | Registered as contractor (Tokyo Gubernatorial Registration). |
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| March 1967 | Tanseisha Kosakusho Co., Ltd. founded (currently Tansei TDC Co., Ltd.). |
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| May 1969 | Registered as contractor (changed to Ministerial Registration). |
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| January 1971 | Sapporo office established (currently the Sapporo branch). |
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| December 1972 | Fukuoka office established (currently the Kyushu branch). |
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| April 1974 | Tohoku office established. |
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| June 1975 | Registered as an office of a first-class architect
(Tokyo Gubernatorial Registration). |
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| November 1978 | TANSEISHA Co., Ltd. (trade name officially changed from Nikki Co., Ltd. in July
of same year) merges with TANSEISHA Co., Ltd. to carry on as a display/decorative design business. |
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| November 1978 | Tansei Business Co., Ltd. founded. |
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| December 1978 | Headquarters completed (Ueno, Taito-ku). |
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| September 1983 | Over-the-counter shares registered with the Japan Securities Dealers
Association. |
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| April 1984 | Tansei Information Institute Co., Ltd. founded (currently Tansei Institute
Co., Ltd.). |
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| December 1984 | Nagoya office established (currently the Nagoya branch). |
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| March 1987 | Shares listed on the Second Section of the Tokyo Stock Exchange. |
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| February 1997 | Tansei Display Co., Ltd. founded. |
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| April 1997 |
Obtained the Real Estate Trader License (Tokyo Gubernatorial Registration). |
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| March 2000 | Shares listed on the First Section of the Tokyo Stock Exchange. |
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| August 2001 | ISO14001 certification acquired. |
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| April 2002 | Game Co., Ltd. (currently JDN Inc.) becomes subsidiary. |
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| June 2003 | TANSEI CREATIVE DESIGN CO., LTD. (Shanghai, P.R.China) founded. |
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| March 2004 | Tansei Humanet Co., Ltd. founded. |
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| August 2005 | Beijing Tansei Co., Ltd. founded. |
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| October 2006 | T&T Co., Ltd. founded. |
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| December 2006 | Obtained Privacy mark usage permit. |
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| September 2015 | Headquarters completed (Konan, Minato-ku). |
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| April 2016 | Transitioned to a company with audit and supervisory committee. |
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| April 2022 | Transitioned to Prime Market, new market segment of Tokyo Stock Exchange. |
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