About Us


Model Ohta era

1912 1922
Model Ohta and Ohta Auto Industry
executives (at Yasukuni Shrine)
Sukeo Ohta establishes Ohta Factory in the Kabutozuka suburb of Sugamo. Factory begins work on airplane engine prototypes. Company name later changed to Ohta Auto Industry.

Moves factory to Kanda Yanagihara. Successfully creates a 4-passenger Model Phaeton OS prototype.

Ohta OS 1921 model
Establishes Kosokukikan Industry Co., Ltd. with 1 million yen capital from Mitsui & Co., Ltd. Starts full scale production of trucks and compact passenger cars.
Sukeo's sons Sukeichi and Sukeshige form the core of design, layout and manufacturing, and the company becomes a well-known Japanese compact car manufacturer.
The factory as it
appeared in 1936
Wins in the Japanese domestic compact car race at the First All-Japan Automobile Competition sponsored by Hochi Shimbun with much fanfare. Wins again at the Third Competition, but authorities force reductions in the production of compact passenger cars as war looms. Wins First All-Japan Automobile Competition
in 1936 (Tamagawa Speedway)

Ohta & Co. era

1946 1946 Sukeo Ohta's third son Sukeshige leaves the company and establishes the independent Ohta & Co. Amid wartime scarcity, the company opens an automobile repair shop, and designs, manufactures and tunes up racing cars competing in publicly managed automobile races. Kosokukikan Industry Co., Ltd. performs poorly at this time, and is absorbed by Tokyu affiliate Kurogane Automobile Industry Co., Ltd.

Manufactures light truck prototypes for Yanmar.

19581959 Ohta & Co. designs and manufactures the Kurogane Baby prototype, a 360cc engine four-wheel automobile.

Establishes Kurogane Small Motor Vehicle Industry Co., Ltd., a subsidiary of Kurogane Automobile Industry Co., Ltd. Sukeshige Ohta becomes technical officer and closes Ohta & Co.

From Tamachi Industries Co., Ltd. to today

1962 1964
The first generation of the HONDA F1, the yield of an organization led by Yoshio Nakamura. Nakamura learned Ohta's four-wheel water-cooled engine technology at Kurogane. Despite closing, Ohta turned out a large number of exceptional engineers.
Despite cumulative production reaching 25,000 units, parent company Kurogane Automobile Industry Co., Ltd. performs poorly and Sukeshige Ohta leaves the company. Kurogane Automobile Industry Co., Ltd. is absorbed by the current Nissan Kohki Co., Ltd., where the engine technology from the Ohta era remains in use. Sukeshige establishes Tamachi Industries, Ltd. with 2 million yen capital at Ohta & Co.'s former site at Tamachi 8-chome, Minato-ku, Tokyo.

Starts business with Toyo Pet Service Center's Special Development Lab, the forerunner of the current TRD of Toyota Technocraft Co., Ltd.

1066 Design and manufacture of the Formula Junior for use in publicly operated gambling races.
1969 Manufacture and sales of the Nearco Mini Formula Car, mounted with a 360cc engine becomes a hot topic in the motor sports industry at this time.
1970 Design and manufacture of the Automatic reverse supply shock-absorber rot machine, as well as many other types of labor-saving machinery.
1972 Current CEO Kunihiro Ohta starts work at Tamachi Industries.
1977 Kunihiro Ohta takes office of representative director.
1978 Installs a fully automatic Narai-type Norton Cam Grinder
1981 Main factory moves to its current location at Minamioi, Shinagawa-ku, Tokyo, and installs a CNC Machining Center, CNC Lathe and surface grinder.
1982 Installs a Toyoda Machine Works GCN32-100 CNC Cam Shaft Grinder.
1986 Installs Mitutoyo AE122 Coordinate Measuring Machine.
1987 Installs a Toyoda Machine Works FH-50 CNC Horizontal Machining Center.
1988 Establishes a second factory at Higashikojiya, Ota-ku, Tokyo. Installs the Toyoda Machine Works FV-80 Large CNC Machining Center and mid-sized FV-45.
1991 Increases capital to 10 million yen.
Moves second factory (current Building A) to Shibakawacho, Fuji-gun, Shizuoka Prefecture. Added the Toyokazu Okuma VMP-8 Gate-Type CNC 5-Axis Machine and Mitutoyo B706 Coordinate Measuring Machine to facilities.
1992 Develops tape sealer for Takara Corp. and begins OEM production.
1996 Constructs second building (current Building B) for Nishi Fuji Factory. Installs CNC lathe and small CNC Machining Center.
1997 Installs 3D CAD/CAM Pro. E and Yasda YBM600N Horizontal Machining Center.
1998 Constructs third building (current Building C) for the Nishi Fuji Factory. Installs Yasda YBM800N Horizontal 5-Axis Machining Center and Mitutoyo BRT-A710S4 CNC Coordinate Measuring Machine equipment, and expands space for the 3D Coordinate CAD/CAM Pro. E and CADCEUS.
2000 Receives award from Toyota Motor Corp. for exceptional service in provision of motor sports parts.
Establishes AIM Corp. in California to strengthen exports to the United States.
2002 Enlarged the site of the Nishi Fuji Factory to an adjacent lot and constructs Building D.
Installs Yasda YBM700NTT Horizontal 5-Axis Machining Center. Continues to organize a system to respond to market needs for even higher precision.
Receives another title of recognition on the heels of the 2000 award from Toyota Motor Corp.
2004 Constructs Building E to connect to Building D. Installs a lineup of machines centered on the CNC 5-axis machining center and horizontal machining center. Robust offering includes machining cylinder heads for development and cylinder block machining.
2005 Installs a Toyoda Machine Works Custom GCS63 III Cam Shaft Grinder to enable machining of dimple R at smaller diameters than before.
2006 Installs a DMG DMU80P.
2007 Installs a ROFIN Laser Processing Machine and obtains KES Environmental Management System certification.
2008 Selected as one of "300 Active Small to Mid-size Manufacturers Supporting Japan's Future".
2009 Obtains ISO 9001 Quality Management Standard in 2008.
2010 Sukeo Ohta inducted into the Japan Automobile Hall of Fame.
2012 Tamachi Industries celebrates its 50th Anniversary and Ohta Auto Industry its 100th Anniversary.