| March
1967 |
Tanseisha Workshop
Co., Ltd., as a base production company of Tanseisha Co., Ltd.,
is established in Yushima, Bunkyo-ku.
Capital: 500,000 yen.
President: Masaharu Watanabe (deceased), the founder of
Tanseisha Co., Ltd. |
| February 1968 |
Shibuya and Nihonbashi
work sites opens. |
| July 1968 |
New capital amount:
2,000,000 yen. |
| November 1969 |
Capital expansion;
new amount: 8,000,000 yen. |
| October 1970 |
Adachi factory
is completed. |
| March 1971 |
Capital expansion;
new amount: 10,000,000 yen. |
| March 1973 |
Capital expansion; new amount:
20,000,000 yen. |
| February 1974 |
Kashiwa workshop opens. |
| March 1975 |
Capital expansion;
new amount: 30,000,000 yen. |
| February 1977 |
Registered as an
office with a 1st-class authorized architect; Mayor of Tokyo,
16171. |
| September 1978 |
Licensed as a specified
constructor; Mayor of Tokyo License(Specified 8) No. 475. |
| November 1978 |
Mr. Eitaro Sakakibara
assumes the post of managing director. |
| December 1978 |
Headquarters move
from Yushima, Bunkyo-ku, to Iriya, Adachi-ku. |
| June 1981 |
Funabashi work
site opens. |
| March 1982 |
Mr. Sadao Wakasugi
assumes the post of managing director. |
| June
1982 |
Company name
changes to Tankosha Co., Ltd., and headquarters move from Iriya,
Adachi-ku, to Ueno, Taito-ku. |
