| 1970 |
Koshin Kogaku Ltd., former Koshin Kogaku Co., Ltd. was founded in Yokohama, producing optical filters. |
| 1975 |
The company was moved to Hadano in Kanagawa. |
| 1980 |
Koshin Kogaku Co., Ltd was founded, undertaking sales and manufacturing. |
| 1985 |
Bodai Office(Factory) was established as the base of sales and manufacturing. |
| 1988 |
R&D Center was built, setting about advanced engineering. |
| 1993 |
New office building was built next to Bodai Office(Factory). |
| 1996 |
R&D Center was moved to Soya in Hadano. |
| 1998 |
Koshin Kogaku Ltd and Koshin Kogaku Co., Ltd was combined in order for efficient operation. |
| 1999 |
Opt-Electronics Systems Center was established, carrying forward advanced electoro-optical engineering. |
| 2000 |
Koshin Kogaku Co., Ltd. achieved ISO9001 Certification on March. |
| 2000 |
Capital increased to 50 million Japanese Yen. |
| 2001 |
Capital increased to 70.5 million Japanese Yen. |
| 2001 |
Tokawa factory was established. |
| 2002 |
Koshin Kogaku Co., Ltd. was accuired by Yamaichi Electronics Co., Ltd. |
| 2004 |
Koshin Kogaku Co., Ltd. achieved ISO14001 Certification on May. |
| 2012 |
Capital increased to 145.5 million Japanese Yen. |
