| 1954 |
Established as the first manufacturer of Variable Area Flowmeter in Japan
by Mr. T. Takanoyama |
| 1957 |
Level instruments (Mechanical) added to line |
| 1969 |
Servo operated type Tank Gauge released |
| 1972 |
Overseas Dept established |
| 1973 |
Metal tube type Micro Flowmeter released |
| 1977 |
Thermal Flowmeter released |
| 1979 |
Tank gauges for Marine Tanker released |
| 1980 |
Certified as the approved manufacturer by High-Pressure Gas Application Regulation |
| 1981 |
Collaboration agreement with Krohne Messtechnik of Germany
Magnetic flowmeter newly released |
| 1982 |
CATAMS (Computer-Aided Tank Monitoring System) introduced |
| 1983 |
Thermal Mass Flowmeter released
Mag-Wheel Flowmeter released |
| 1986 |
Mass Flow Controller released
Thermal Flowmeter (High Temperature version) released |
| 1987 |
In-line type Ultrasonic Flowmeter released
Engine Blow-by Gas Measurement System released
Distributor agreement with Kistler-Morse of USA |
| 1988 |
AM Series Compact V / A Meter released
Mass Flowmeter / Controller (High Pressure Version) released
Thermal Liquid Meter released |
| 1989 |
Clamp-on type Ultrasonic Flowmeter released |
| 1990 |
CALTIS (Cargo Level and Temp. Information System) released
ITMS (Integrated Tank Management System) released |
| 1991 |
Mini-Thermal Flowmeter released |
| 1993 |
Torque tube type Displacer Level Transmitter released
Hall element based Marine Level Sensor released |
| 1994 |
Distributor agreement with McCrometer of USA
McCrometer's V-Cone introduced
UCUF PFA small size Ultrasonic Flowmeter released |
| 1995 |
Distributor agreement with Auxitrol of France
Auxitrol's Marine Radar Gauge introduced |
| 1996 |
Distributor agreement with MTS of USA
MTS's Magnetostrictive Transmitter introduced |
| 1997 |
Flow Level Engineering (S.E.A) Pte Ltd, (Joint Venture Co.)
established in Singapore |
| 1998 |
New President, Dr. T. Sugi inaugurated
Company reorganized for the new century
Certification of ISO9001 obtained |
| 1999 |
TOKYO KEISO KOREA established
Production factory established in Taiwan
OEM agreement with NORTON PERFORMANCE PLASTICS
and NORTON ASTI |
| 2001 |
Yokohama Factory renewed and expanded |
| 2002 |
Production factory established in Shanghai, China |
| 2004 |
Local subsidiaries for sales and maintenance established in Taiwan, Singapore, Thailand, Malaysia and Indonesia |
| 2005 |
Local subsidiary company established in Shanghai in China |
| 2007 |
Certification of ISO14001 obtained |
| 2009 |
Production plant established in Fujian in China
Production plant established in Thailand
Joint company for production and sales established in Chongqing in China |
| 2010 |
Local subsidiary company established in USA |
| 2011 |
Okinawa factory established in Okinawa, Japan |
| 2015 |
HAKUSAN BUSINESS CENTER established in Yokohama |
| 2017 |
Osaka Branch Office established |
| 2018 |
New CEO, Mr. Ryoichi Sugi inaugurated |
| 2020 |
Renewal of Yokohama Factory. |