Overview & History


Company Summary



Head Office & Plant

136, Washizu, Kosai City, Shizuoka Prefecture, 431-0431 Japan

Head Office & Plant

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Kibi Plant

3297-7, Kibi-Ichinomiya, Kosai City, Shizuoka Prefecture, 431-0441 Japan

Kibi Plant

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Representative Yukihiro Kato, President
Established July 25, 1950
Capital 0.47888 billion yen
Land size Total 121,170m²(Head Office & Plant 35,170m², Kibi Plant 86,000m²)
Building space Total 80,940m²(Head Office & Plant 37,330m², Kibi Plant 43,610m²)
Number of associates Consolidated Basis 4,438
Non-consolidated Basis 1,714 (as of March, 2023)
Products Horns, Duty Control Valves, Evaporative Leak Check Modules, Oil Pressure Control Sorenoides, Non Contact Sensor:NCS, iVCT Solenoides, Electric Combination Valves, Magnet Switches, Actuator Assy, Auto Faucet, ABS Coils, Solenoides, Coils, Sensors, etc.


President Yukihiro Kato
Managing Director Jiro Nakamura
Hiroshi Tanimura
Director Akio Toyoda
Yoshiaki Deguchi
Auditor Masanori Asawaka
Executive Officer Junichi Nakahira
Hiroyuki Nakamura
Katsushi Hirao
Yoshikazu Yagi
Akira Shimazu
Tetsuji Fukaya



Our company was founded at Kosai city, Shizuoka prefecture : the birthplace of Sakichi Toyoda (the founder of TOYOTA group) in 1950.

We initially named Washizu Seisakusho Co.,Ltd., we started our operation by manufacturing automotive parts for Nippondenso Co.,Ltd. (current DENSO CORPORATION).

Then we were renamed to HAMANAKODENSO CO.,LTD. in 1967. Ever since then, we have made steady progress as a member of DENSO group companies.

Here is one of Sakichi's last teachings: "Open your mind, and look at the great world outside". This instruction has cultivated our corporate philosophy of respecting challenges in the new world.

Following his spirit, we aim to become a company that contributes to improving the lives of people all over the world.

豊田佐吉翁 Sakichi Toyoda


1950 July Washizu Seisakusho Co., Ltd. was established.
Washizu Seisakusho Co., Ltd. began producing automotive parts for Nippondenso Co., Ltd.
(current DENSO CORPORATION) [capital: 300,000 yen]
1967 November Washizu Seisakusho Co., Ltd. was renamed to HAMANAKODENSO CO., LTD.
1971 November HAMANAKODENSO was designated a QC model plant by Nippondenso Co., Ltd.
1979 November Awarded the DEMING PRIZE.
1982 October Awarded the Excellence Prize in Industrial Health Management by the Shizuoka Labor Bureau.
1983 March Horn production business transferred from Nippondenso Co., Ltd.
1989 April The Kibi plant was completed.
1989 July Awarded the Progress Prize in Industrial Safety by the Shizuoka Labor Bureau.
1990 October Awarded the Effort Prize in Industrial Health Management by Minister of Labor.
1992 February Awarded an excellent company prize on the 20th anniversary of the municipalization of Kosai City.
1993 July The Toyohashi Office became the affiliated company "HAMADEN P.S CO., LTD."
1994 October Kibi Football Ground was opened.
1998 February Received QS9000 certification.
1999 August Kibi plant's 2nd-phase expansion was completed.
2000 January Received ISO14001 certification.
2002 May Zero emissions were achieved.
2003 March PT.HAMADEN INDONESIA MANUFACTURING (HDI) received ISO14001 certification.
2004 May Received ISO/TS16949:2002 certification.
2007 2007 May The Technical and Training Center was completed.
August Kibi plant’s 3rd-phase expansion was completed.
2008 2008 October HAMADEN VIETNAM CO., LTD.(HDVN) was established.
December UN / ECE (United Nations Economic Commission for Europe) was acquired for horns.
2013 2013 May HAMADEN VIETNAM CO., LTD.(HDVN) received ISO/TS16949 certification.
November Awarded the Volvo Quality Excellence Prize (VQE)
2014 April HAMADEN MEXICO S.A. DE C.V. (HDMX) was established.
2015 June New canteen (named" Blue Terrace") was completed.
2017 January HAMADEN MEXICO S.A. DE C.V. (HDMX) received ISO/TS16949 certification.
2018 June Manufacturing Bldg was completed.

Corporate Brochures

Corporate Profile

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Corporate Outline

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Products Catalog

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