Hospitality spacePublic spaceEvent spaceBusiness spaceCultural space
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| (常任代理人 日本マスタートラスト信託銀行株式会社) | ||||||||
| INTERACTIVE BROKERS LLC | ||||||||
| 丹青社取引先持株会 | ||||||||
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| 株式会社日本カストディ銀行(投信口) | ||||||||
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Founded Watanabe Masaharu's exhibition decoration business in Yamanouchi, Tokyo
Founded: October 1946
Established Sankou Co., Ltd. (later renamed to Nichiki Co., Ltd.) in Marunouchi, Chiyoda-ku, Tokyo
Established/Founded: October 14, 1949
Reorganized as Dansei Co., Ltd. (the actual successor) and established the current organization, with headquarters in Kanda Jishimachi, Chiyoda-ku, Tokyo
Reorganized into Tansei Co., Ltd. (the de facto surviving company) and founded the current organization: Headquarters located at Kanda-Ji-cho, Chiyoda-ku, Tokyo
Reorganized into Dansei Co., Ltd. (de facto surviving company) and established the current organization with headquarters in Kanda Jishamachi, Chiyoda-ku, Tokyo
December 25, 1959: (reorganized into the current structure)
Established/Founded: December 25, 1959: (reorganized into the current structure)
Moved headquarters to Yushima, Bunkyo-ku, Tokyo
Established Osaka branch office (registered as a branch in July 1984, now Kansai branch)
Registered as a construction contractor (prefectural governor registration)
Established Dansei Co., Ltd. Workshop (now Dansei TDC Co., Ltd.)
Construction contractor registration changed from prefectural governor to Minister of Construction registration
Established Sapporo branch office (registered as a branch in July 1984, now Sapporo branch)
Established Fukuoka branch office (registered as a branch in July 1984, now Kyushu branch)
Established Tohoku branch office
Registered as a first-class architect office (prefectural governor registration)
Dansei Co., Ltd. (changed its name from Nichiki Co., Ltd. in July of the same year) absorbed and merged with Dansei Co., Ltd., inheriting the exhibition decoration business. Established R.B. Co., Ltd. (now Dansei Business Co., Ltd.)
Tansei Co., Ltd. (changed its name from Nichiki Co., Ltd. in July of the same year) absorbed Tansei Co., Ltd. and continued the exhibition decoration business. Established R.B. Co., Ltd. (now Tansei Business Co., Ltd.)
Constructed a company building in Ueno, Taito-ku, Tokyo, and moved headquarters
Registered as a stock market dealer with the Tokyo District Association of the Japan Securities Association
Established as Tansei Comprehensive Research Institute Co., Ltd. (now Tansei Research Institute Co., Ltd.)
Established Nagoya Sales Office (registered as a branch in April 1989, now Nagoya Branch)
Listed on the Second Section of the Tokyo Stock Exchange
Established Tansei Display Co., Ltd.
Obtained governor's license for real estate brokerage
Designated as a First Section company of the Tokyo Stock Exchange
Obtained ISO14001 certification
Made Game Co., Ltd. (now JDN Co., Ltd.) a subsidiary
Established Tansei Humannet Co., Ltd.
Obtained certification for use of the Privacy Mark
Moved headquarters to Minami-Koto, Minato-ku, Tokyo (current address)
Transitioned to a company with an Audit and Other Committees
Transitioned to the Prime Market of the Tokyo Stock Exchange
Tansei Co. conducted a survey on 104 employees regarding regrets after office relocation and renovation, and released a report. The survey revealed that the top regret points were crowded meeting rooms and a lack of quiet spaces.
Tanseisha Co., Ltd. received awards for projects involving its spatial design work and its own exhibition booth at the Wood Design Award 2026, hosted by the Japan Wood Design Association. The company said the awards were a great source of encouragement for its designers and others involved, and that it will continue striving to create enriching spaces.
On November 19, 2026, at the "Material Caravan in JAPANTEX," designer Junichi Takahashi and Shintaro Yamaguchi from Dansei Co. will speak. They will discuss the theme "Communicating Environmental Considerations – Adding Value to Environmental Contribution Through Design."
On November 6, 2026, at the Tokyo Big Sight, Junichi Nasu from the Dansei Design Center will speak at the special seminar of the Leisure & Service Industry Expo 2026. The theme is "Development of attraction facilities integrated with IP such as anime and manga," and he will introduce the latest trends in entertainment facilities utilizing IP and digital technology, as well as examples of LBE (Location Based Entertainment).
Dansei Co., Ltd. has decided the content for the research results presentation event "Super Cultural Festival 2026" in the self-initiated project led by young employees. The event will be held at Portnan Lab Marks Three from November 24 to 27, featuring original content such as the immersive horror "Kurayami Subway" that utilizes tactile and audio technology, and "YU-MO Home", which allows users to experience the daily life of people with hearing impairments.
On November 3, 2026, at Tokyo Midtown, the talk session of "JAPAN FURNITURE SHOW by IFFT 2026" will feature Tansei Design Center's Principal Creative Director, Yasutaka Uekaguchi. The session theme is "Considering Space: Why Choose Japanese Furniture".
At the Japan Space Design Award 2026, Tansei Co., Ltd.'s space design project "National Science Museum Japan Hall 1st Floor South Wing "Viewing Nature Technology"" received the Gold Award for Cultural Exchange Space, and "YKK AP Technology Hall" received the Gold Award for Corporate Promotion Space. Additionally, the company's case was selected for both the Shortlist and Longlist.
On November 8, 2026, at Shibuya Hikarie, Tanaka Rida, Senior Creative Expert at Danchou Design Center, will participate and speak at UNION EXPO 2026. He will take part in a spatial designer work experience workshop and a talk session 'DesignersEdge' where we consider future spaces and society. The event is free and requires pre-registration.
At the 60th Japan Sign Design Award, Danchōsha's space design for the "YKK AP Technology Museum" received the Japan Sign Design Grand Prize / Minister of Economy, Trade and Industry Award. Additionally, three works received silver awards, two works received bronze awards, and there were also other selected works.
Tansei Co. has received the 2026 Good Design Award for the 'YKK AP Technology Museum', which it designed, and 'SHIKISAI GARDEN -Seasonal colors-' at Terminal 1 of Narita International Airport. The 'YKK AP Technology Museum' is a display facility that renovated the former aluminum melting extrusion plant building completed in 1959, and it opened in November 2024. Tansei Co. says it will continue to create rich spaces while valuing the perspective of users.