| 1950.4 | Established Yoshishiba Shoten at 4-24-26 Azusawa,
Itabashi-Ku, Tokyo |
| 1964.4 | Began distribution of steel material,
President Hiroshi Yoshishiba |
| 1969.5 | Became an incorporated firm, named Yoshishiba Shoten
(Capital: \2,500,000) |
| 1977.7 | Established Toda Plant (began processing department) |
| 1985.1 | Established No.2 Toda Plant and built a new
head office building |
| 1986.8 | Company name changed to Yoshiken Co., Ltd.
Capital increased to \17,500,000 |
| 1989.12 | Established Toda Office |
| 1991.4 | Purchased a company housing at Toda Sasame |
| 1993.5 | Installed the first Laser Processor |
| 1995.7 | Installed the second Laser Processor |
| 1996.8 | Established Toda Processing Center
(went into manufacturing) |
| 1997.10 | Installed Plasma Processor and NC Hole Puncher
at the Processing Center |
| 2000.1 | Began full-scale operation of designing, manufacturing and marketing of various manufacturing equipment |
| 2001.1 | Newly installed CAD/CAM equipment for Laser Processor
(Data exchange utilizing Internet is now possible) |