| Mar. 1944 |
Established with capital of ¥180,000 as Ojiya Aircraft Parts Mfg.. Co., Ltd at Ojiya City, Niigata Pref. |
| Jul.1944 |
Started business |
| Jan.1948 |
Renamed to Dai-ichi Sokuhan Works Co |
| Jun.1958 |
Established Tokyo Office |
| Feb.1959 |
Designated as JIS Class III Factory |
| Sep.1961 |
Designated as JIS Class II Factory; Designated items: All screw thread gauges, including Metric, Unified, Whitworth, etc. |
| May.1963 |
Established Osaka Branch |
| Oct.1963 |
Established Nagoya Branch |
| May.1966 |
Moved head office and factory to 1222m Hiu-ko, Ojiya City, Niigata pref. |
| Aug..1966 |
Designated as JIS Class I Factory; Designated items: Limit Gauges for Metric & Unified Screw Threads, Limit Gauges for Parallel Pipe Threads, Gauges for Taper Pipe Threads |
| Nov.1975 |
Started marketing of air micrometer |
| Jan.1976 |
Established "millipneu" air micrometer technical engagement with Feinpruf of west Germany |
| Aug.1979 |
Started marketing of ball screws. |
| Jun.1980 |
Constructed ball screw factory. |
| Aug.1982 |
Successfully developed differential pressure type digital air micrometer "admec" |
| May.1987 |
Successfully developed Measuring Machine for Small Bore Diam. & Internal Diam. "IDM" |
| Mar.1989 |
Developed Super Precision Indexing Device "SPID-720" |
| May.1990 |
Moved head office and factory to 826-2, Tsubono, Ojiya City, Niigata Pref. |
| Oct.1992 |
Successfully developed Column type Air/Electronic Micrometer "COLMEC" |
| Oct.1994 |
Successfully developed Measuring Machine For Small Internal Diameter IDM-30 EX |
| Mar.1998 |
Registered as company getting acquire of ISO-9001 |
| Apr.2003 |
Started marketing of Compact type Air Micrometer "mini" |
| May.2005 |
Started marketing of Grind Gauge |
| Sep.2005 |
Registered as company getting acquire of ISO-14001(For Head Office only) |
| Oct.2005 |
Established Shanghai Office in P.R. Chaina |
| Jun.2006 |
Started marketing of "T-Safe" |
