History
| March 1921 | Founder late Nara Torasaburo the Dotora shopping at individual shops to its founding. |
| April 1944 | It becomes the exclusive distributor of Osaka yaw line Cement Co., Ltd. (currently Sumitomo Osaka Cement Co., Ltd.). |
| March 1950 | After Torasaburo death, he founded the Corporation Dotora shopping at corporate reorganization and capital 500,000 yen, |
| December 1952 | Osaka Sumiyoshi-ku, Kohama address 2-chome, 46, the acquisition of land 1,226m2 along the 26 Highway, the construction of office and warehouse, etc. 495m2. |
| March 1955 | The capital increase to 1.5 million yen in capital. |
| March 1965 | The capital increase to 3 million yen in capital. |
| December 1968 | Construction of the Nagono Building , move to new premises. |
| March 1970 | The capital increase to 6 million yen in capital. |
| March 1974 | Suminoe-ku, and renamed the company name and Co. Tutsi tiger along with the birth. |
| March 1987 | Shunpei Nara, he became Chairman of the Board, Third generation, Nara Yuzo, he became President. |
| November 1990 | To open a Mihara sales office in Habikino Kozu 116 No. 1 issue. |
| March 1993 | The capital increase to 10 million yen in capital. |
| March 2012 | Mihara sales office, to withdraw to the headquarters. |
| January 2013 | Mihara sales office, to withdraw to the headquarters. |
| January 2014 | Leading to the overseas export business start now. |