| 1948.03 | Company established at 2-31-8 Nishi-Shinbashi, Minato-ku, Tokyo with a capital of 180,000. |
| 1953.08 | Capital increased to 1,500,000. |
| 1958.12 | Funabashi factory completed in Chiba prefecture. |
| 1959.04 | Capital increased to 3,500,000. |
| 1964.06 | Authorization received for oil seal manufacturing (JIS B-2402). |
| 1964.09 | Capital increased to 5,500,000. Osaka sales office established. |
| 1966.10 | Authorization received for O-ring manufacturing (JIS B-2401). |
| 1967.08 | Sapporo sales office established. |
| 1967.12 | Head office moved to Roppongi, Minato-ku, Tokyo. |
| 1968.09 | Capital increased to 10,000,000. |
| 1969.04 | Fukuoka sales office established. |
| 1976.10 | Ohtawara Factory completed in Tochigi prefecture. |
| 1983.04 | Sendai sales office established. |
| 1986.03 | Distribution center completed at Ohtawara Factory. |
| 1988.05 | Enlargement of Ohtawara ?.2 Factory. |
| 1989.04 | Enlargement of Ohtawara ?.3 Factory. |
| 1996.11 | Funabashi ?.2 Factory completed for facilitate development, test and experiment. |
| 1998.11 | Authorization received for ISO-9001 (JET-0138) at Funabashi Factory. |
