Established in Tokyo as AH Laboratories.
Developed vacuum thermocouples for measuring high frequency current.

Moved to the current location and built a new factory.
Changed company name to Tokyo Rika Kogyo Kenkyusho K.K.

Changed the company name to the current name Rika Kogyo K.K.

Company was registered as Rika Kogyo K.K. (Legally established)

Developed a bimetal type temperature controller for baking ovens.
Developed a surface temperature indicator HP9.

Built a head office building at the current location.

Built a factory in Ibaraki prefecture.
Developed a melt pressure sensor CZ-1P

Started export. Appointed distributors in the U.S., Hong Kong and Taiwan.

Expanded the Ibaraki factory.

Developed MD-51 and MF-51 heat/cool type temperature controllers that contribute to energy saving.

Developed REX-C1000, one of the world’s first digital controllers with PID Autotuning.

Developed REX-Z2000, one of the first multi-zone temperature controllers.

Developed an extrusion line process controller FAREX-E1

Developed an epoch making modular controller FAREX-SR Mini.

Accredited by ISO9001.

Developed F9000, a highly accurate controller with high resolution.

Accredited by ISO14001.

Expanded Ibaraki factory and built a new building.
Developed digital controllers with fast sampling: SRX and HA400 / HA900
Developed a digital controlled single phase power controller THV-1.

Developed digital handheld thermometer DP-700.
Developed high performance controllers FB400 / FB900.

Developed a modular controller SRZ.

Developed digital controllers RB100 / RB400 / RB900.
Accredited by JCSS (Japan Calibration Service System) as an accredited calibrator (category: temperature).

Developed a program controller PF900.

Developed digital controllers RZ100 / RZ400.

Developed advanced controllers FZ110 / FZ400 / FZ900.