| Year |
Event |
| 1923 |
Yoshio Yamamoto(1911-1976) is apprenticed to the fountain pens manufacture of Tokyo Japan that Sadao Yamamoto(1897-) of the older brother runs |
| 1928 |
Sadao Yamamoto begins to produce fountain pens manufacture of Dalian China |
| 1934 |
First Yoshio Yamamoto begins to produce fountain pens manufacture of Dalian China |
| 1941 |
From Dalian China to Osaka Japan |
| 1944 |
From Osaka Japan to Tottori Japan |
| 1960 |
Take place of a method to sell after laying in stock of a major maker product. |
| 1982 |
Begin to make the fountain pen of the custom made with handwork in two people of Harumi Tanaka(1937-) of the master and Masaaki Yamamoto(1942-) of the second generation. |
| 2009 |
Ryo Yamamoto(1974-) of the third generation is mastered after the ascetic practices of 13 years at the same time |
| 2010 |
Harumi Tanaka of the master finishes the production of the fountain pen for 29 years and retires at 74 years old. |
| 2014 |
80th anniversary |
