Imasen Electric Industrial Co., Ltd.

Company Profile



1 Kakihata, Inuyama-shi, Aichi-ken, 484-8507, Japan

Business Overview

-An independent automotive parts manufacturer.

-Mainly manufactures and sells mechanical components and electronic components for automotive use.

-Major manufacture of mostly seats and electric products, which accounted for 81.4% of total sales. (As of the fiscal year that ended in March 2023)

-The Company has a 24% share of the seat-adjuster market and a 25% share of the seat-recliner market in Japan, according to its own research.

-In order to strengthen the seat business, the Company invested in TS Tech.


-From April 2022, moved to the Prime Market of the Tokyo Stock Exchange, and to the Premium Market of the Nagoya Stock Exchange. (As of Mar. 31, 2023)
Name or Company Name Investment Ratio (%)
TS TECH Co.,Ltd. 35.54
The Master Trust Bank of Japan, Ltd. (Trust Account) 4.81
Business partner share holding association 3.96
Employee stock holdings 3.06
Custody Bank of Japan, Ltd. (Trust Account) 2.42
San Ju San Bank, Ltd. 2.25
NHK Spring Co., Ltd. 1.38
Honda Motor Co., Ltd. 1.29
Total 57.61

-It applied on May 12, 2023 to be relisted on the Standard Market. It is expected to be relisted on October 20.


Mechanical products
Seat adjusters
-Power seat adjusters

  • Lightweight power seat devices
  • High strength power seat devices
  • Lift-up and rotation device for vehicles designed to carry physically challenged passengers

-Round units
-Slide adjusters

  • Standard rails
  • Long rails

-Height adjusters
-Brake units
-Recliner devices with automatic restoration function

Window regulators
-Wire type window regulators
-X-ray type power window regulators

  • X-ray type power window regulators
  • Mono-arm type power window regulators


Electric products
-Electric products and relays

  • Electronic units
  • Micro ISO relays


  • Over head consoles
  • Interior lamps
  • High-mounted stop lamps
  • Rear combination lamps
  • LED lamps for illumination lighting


  • Flat horns
  • Spiral horns
  • Air horns

-Power electronics products

  • DC-DC converters
  • Control ECUs for air conditioning blower motors

-Body controlling products

  • Control ECUs for power seats and seat heaters
  • Body control modules
  • Slide door control ECUs

-Safety products

  • Back-up batteries
  • Image switchable ECUs


-Speed sensors
-Damper actuators for car air conditioning systems
-Magnetic valves


Feb. 1939 Established Imasen Electric Industrial Co., Ltd.
Feb. 1947 Established Inuyama Plant.
June 1954 Started the production of lamps.
Mar. 1955 Started the production of relays.
June 1958 Started the production of window regulators.
Nov. 1960 Established Mizushima Plant.
Sept. 1962 Established Knight Beam Co., Ltd.
Nov. 1962 Established Knight Denso Co., Ltd.
Dec. 1963 The Company built a plant in Nagoya.
Nov. 1965 The Company started manufacturing automotive seat-reclining adjusters.
Nov. 1966 The Company started manufacturing automotive slide adjusters for seats.
June 1967 Established a subsidiary, Toyo Koku Denshi Co., Ltd., which is (currently a consolidated subsidiary).
Sept. 1968 The Company established Imasen Electric & Machinery Co., Ltd., which is (currently a consolidated subsidiary).
Aug. 1971 The Company built a plant in Hiroshima.
June 1973 The Company built a plant in Shirakawa.
Feb. 1979 The Company moved its headquarters to Inuyama City, Aichi Prefecture.
Jan. 1982 The Company merged Night Seiki Co., Ltd., into its operations (This is currently the Kani Plant).
Apr. 1982 Established a subsidiary, Imasen Engineering Corporation, which is (currently a consolidated subsidiary).
Nov. 1985 The Company began manufacturing automotive power adjusters for seats.
Oct. 1993 The Company merged Knight Denso Co., Ltd. into its operations. It was formerly called the Okayama Plant.
Apr. 1995 The Company established a plant in Yaotsu Cho, Gifu Prefecture.
July 1996 The Company established Imasen Philippine Manufacturing Corporation, which is (currently a consolidated subsidiary).
Dec. 1996 The Company's stock was registered as over-the-counter issues by Japan Securities Dealers Association.
Apr. 1997 The Company established Imasen Bucyrus Technology Inc., which is (currently a consolidated subsidiary).
May 1999 The Company built a new plant in Okayama.
Sep. 2001 Listed on the Second Section of Nagoya Stock Exchange.
Dec. 2001 Established an overseas subsidiary, Guangzhou Imasen Electric Industrial Co., Ltd., which is currently a consolidated subsidiary.
Sep. 2002 Designated in the first section of Nagoya Stock Exchange.
Dec. 2002 Obtained ISO 14001, the international standard for environmental management.
Jan. 2003 Established an overseas subsidiary Imasen Manufacturing (Thailand) Co., Ltd. (currently a consolidated subsidiary)
Feb. 2003 Listed on the first section of Tokyo Stock Exchange.
Feb. 2004 Obtained ISO/TS16949: 2002
Apr. 2004 Absorbed a subsidiary, Knight Beam Co., Ltd. (This is currently the Harusato Plant.)
Apr. 2007 Established a subsidiary, Kyushu Imasen Co., Ltd. (currently a consolidated subsidiary).
Nov. 2007 Established a subsidiary in Indonesia, Imasen Manufacturing India Private Limited (currently a consolidated subsidiary).
Mar. 2011 Established Wuhan Imasen Electric Industrial Co., Ltd. in Whuhan, Hubei Province, China.
Jul. 2012 Established a subsidiary, Imasen Mexico Technology S.A. de C.V., in Mexico.
Aug. 2014 Established a subsidiary, PT Imasen Parts Indonesia, in Indonesia (currently a consolidated subsidiary).
Apr. 2015 Established Imasen Global Development and Training Center.
Jun. 2015 Established German Branch office.
Nov. 2020 Signed an agreement with TS Tech Co., Ltd. to form a capital-based business alliance.
Aug. 2022 Established Mazda Imasen Electric Drive Co., Ltd.

Supplemental Information 1