Corporate data (as of July 2023)
| Trade name | DPI Ltd. |
|---|---|
| Foundation | Founded in 1933 as a special steel tool manufacturing company |
| Establishment | Established in 1948 as Tokushu Seiko Co., Ltd. in Nerima-ku, Tokyo |
| Representative | Tomoyuki Nakashima, Representative Director and President |
| Capital | 90 million yen |
| Shareholders | Daido Steel Co., Ltd., Daido Kogyo Co., Ltd. |
| Number of employees | 239 people |
| Production items |
High-performance precision automotive parts such as turbochargers Precision machined parts such as compressors Design, development, and manufacture of power transmission devices such as couplings and related parts |
| Certification etc. |
IATF16949 SRI No.6286-01 ISO 9001 JICQA No.0316 ISO 14001 JICQA No.E772 |
Corporate history
| April 1933 | Founded as Tokushu Kougu Seisakusho, a manufacturer of special steel product |
| June 1937 | Became independent as Tokyo Tokushu Kougu Seisakusho |
| May 1948 | Established as Tokushu Seiko Co., Ltd. in Nerima-ku, Tokyo. Capital: 2 million yen |
| September 1953 | Capital increased to 4 million yen |
| May 1957 | Capital increased to 9 million yen |
| May 1958 | Capital increased to 12 million yen |
| May 1961 | Capital increased to 30 million yen Asaka Plant completed in Asaka, Saitama |
| March 1962 | Capital increased to 60 million yen |
| June 1963 | Technical partnership with Pinch Bamag AG, Germany regarding electro-magnetic clutch |
| January 1965 | Transferred and consolidated Tokyo Plant to Asaka Plant |
| May 1968 | Transferred and consolidated Head Office to Asaka Plant |
| November 1973 | Technical partnership with Formsprag Co., a division of Dana Inc., USA regarding coupling |
| April 1976 |
Daido-Sprag Ltd. was established in Asaka, Saitama. Capital: 100 million yen Investment ratio: Dana Inc. (40%) Daido Steel Co., Ltd. (30%) Tokushu Seiko Co., Ltd. (20%) Daido Kogyo Co., Ltd. (10%) |
| December 1976 | Transferred and consolidated Head Office and sales office of Daido-Sprag Ltd. to Toranomon, Minato-ku. |
| June 1978 | Daido Steel Co., Ltd. has taken a capital stake in Tokushu Seiko Co., Ltd. Investment ratio (42.4%) |
| November 1983 | Tokushu Seiko Co., Ltd. introduced TQC and JK. ITS30 activities started. |
| December 1994 | Dana Inc. sold its holdings in Daido-Sprag Ltd. to Daido Steel Co., Ltd. Dissolved the joint venture relationship with Dana Inc. |
| September 1995 | Established DPI Ltd. Merged with Daido-Sprag Ltd. Transferred Head Office to Nishiikebukuro, Toshima-ku, Tokyo. Capital: 90 million yen |
| April 1996 | Established Ranzan Plant in Ranzan, Saitama. |
| May 1996 | Transferred and consolidated Asaka Plant and Sagami Plant to Ranzan Plant. |
| April 1998 | Acquired ISO 9001 and completed Musashi Dormitory in Ranzan-machi. |
| January 2004 | Acquired ISO 14001 |
| August 2006 | Expanded Ranzan Plant |
| October 2014 | Technical partnership with TB Wood’s Inc. (Altra Group) regarding TORSIFLEX® couplings |
| October 2015 | Opened Osaka office |
| March 2017 | Acquired ISO/TS16949 certification |
| April 2018 | Acquired IATF16949 certification |
| July 2021 | Became a 100% subsidiary of Daido Steel Group through share consolidation |
