| 1956 |
Founded the department that specialized in oil brakes, which was later separated and transferred from Sanwa Seiki. |
| 1961 |
Received an official commendation in excellence after evaluation by the Director of the Small and Medium Enterprise Agency, on the basis of the enterprise diagnosis system. |
| 1962 |
Technical collaboration with the Bendix Corp. U.S.A., on cylinders for oil brakes for automotive vehicles. |
| 1966 |
Concluded the technical assistance contract with Automotive Product Ltd. U.K., for a steering wheel ball joint and vehicle suspension system. |
| 1967 |
Enlarged a casting factory to 825 m² and separated to set it up as a new company: Saitama Precision Casting Co., Ltd. |
| 1967 |
No.1 Chichibu Plant was established. |
| 1968 |
No.2 Chichibu Plant was established. |
| 1969 |
No.3 Chichibu Plant was established. |
| 1969 |
Nishiumi Engineering Laboratory was organized to integrate the research, development, and testing departments of companies in the Nishiumi group. |
| 1970 |
Nishiumi Purchasing Center was organized to integrate the purchasing departments of companies in the Nishiumi group. |
| 1973 |
 Awarded with the Deming Prize. |
| 1978 |
The building of No.2 Chichibu Plant was enlarged and No.1 Chichibu Plant was integrated into this plant. The name was changed to Yoshida. The name of the No.3 Chichibu Plant was also changed to Miyado at this time. |
| 1980 |
Yono Plant was enlarged. |
| 1981 |
Concluded the technical assistance contract with Automotive Product Ltd. U.K., for automatically adjusted wheel cylinders for use on vehicles. |
| 1985 |
Concluded the technical assistance contract with San Yes Automotive Industry Co., Ltd. |
| 1987 |
Started production of Full Power Brake Systems. |
| 1995 |
Established Kodama Laboratory. Set up machinery for endurance testing of brake dynamometer and rig. |
| 1996 |
Started production of a drum brake assembly for heavy-duty vehicles. |
| 1997 |
Authorized the “comfortable place of work” promotion plan. |
| 1997 |
Acquired the site of Saitama Hino Jidosha Hanbai for C plant. Purchased approx. 3,500 m². |
| 1998 |
Certified as an ISO9002 corporation. |
| 1998 |
Achieved a record of 3.9 million hours without work-related accidents. Recognized as “Class One” by the Ministry of Labor. |
| 1999 |
Started production of a rear drum brake shoe for heavy-duty vehicles. |
| 2000 |
Started production of a front drum brake shoe for heavy-duty vehicles. |
| 2002 |
 Certified ISO14001. |
| 2002 |
Established 5.9 million hours without work related accidents. Recognized as “Class Two” by the Ministry of Health, Labor, and Welfare. |
| 2002 |
Saitama Seimitsu Co., Ltd. was merged with Saitama Kiki Co., Ltd. and called as Kodama Plant of Saitama Kiki Co., Ltd. |
| 2002 |
 Authorized as Sai-no-kuni Factory. |
| 2003 |
 Certified ISO9001: 2000. |
| 2003 |
Began construction of a SAW brake. |
| 2004 |
Honored by the Director-General of the Social Insurance Agency. |
| 2004 |
Received a letter of appreciation from the Minister of State, Mr. Yoshinori Ohno. |
