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Company Overview

Name Koshuha Co., Ltd.
Main office & Factory 243-0303 4052-1 Nakatsu, Aikawa-machi, Aikou-gun, Kanagawa Japan MAP
TEL. +81 46 286 8175 FAX. +81 46 286 1065
Tokyo office 110-0016 ISM Akihabara 7F, 24-2 Taito-1, Taito-ku, Tokyo Japan MAP
TEL. +81 3 5807 2101 FAX. +81 3 5807 2102
Established July 1976
Capital ¥50,000,000
Manager President-director Shunichi Nishizawa
  • Design and production of HF Induction heating equipment with its power supply (ISO9001 certified).
  • HF Induction heat treatment processing service (ISO9001 certified).
  • Design, production and sales of Vacuum heat-treatment furnace.
  • Import and sales of powder press machines.
  • Design, production and sales of synchronous generator unit.
  • Design, production and sales of telescopic pole unit.
  • Installation including wiring and piping and service support of the products above.
Shareholder DKK Co., Ltd. ( Listed Company on the 1st section of Tosho )
Employee 75
Sales $23 million ( at Mar 2018 )
Banks Sumitomo Mitsui Banking Corporation, Isehara Branch & Marunouchi Branch
Financial Statement Financial statement_2021



Jul 1976 Founded as Omoto Industry Co., Ltd. at Isehara Kanagawa with capital 5,000,000 Yen.
Nov 1979 Renamed as Koshuha Co., Ltd. and relocated to present office. Started to produce conveyor system, induction heating equipment and its generator unit and so on.
1989 Drew contract of agency in Japan with DORST Technologies GmbH in Germany to deal powder forming press products.
May 1990 Drew contract of agency in Japan with Linear Abraisive, Inc. in USA to deal milling machine products.
Dec 1993 Licensed by ALD (Aichelin-Leybold-Degussa) in Nederland to sell vacuum furnace products.
May 1994 Increased capital to 10,000,000 Yen.
Nov 2002 Succeeded business of Seidensha Co., Ltd. and started to generator unit at Isehara factory.
Jul 2009 Succeeded HF induction heating equipment and its processing service business from DKK Co., Ltd..
Jan 2010 Succeeded high frequency induction heating equipment and heating contraction business from DKK Co., Ltd..
Apr 2010 Succeeded Vacuum furnace business of Denko Metallurgical Technologies Co., Ltd and opened Tokyo office.
May 2014 Licensed as general contractor by Kanagawa prefectural governor with ID 80129.
Apr 2015 Returned production division of HF induction heating equipment back to DKK Co., Ltd..
Mar 2016 Increased capital to 50,000,000 Yen.
Dec 2016 Website renewal
Jun 2021 Relocation of Tokyo Office to Taito District


  • Main Office & Factory
    243-0303, 4052-1 Nakatsu Aikawa-cho
    Aiko-gun Kanagawa, Japan
    TEL: +81 46 286 8175
  • By public transportation
    • Get off Hon-Atsugi station of Odakyu-Odawara-line to ride Kanachu-bus below at No. 10 in Atsugi Bus Center to get off at Nishi-4-chome station
      • To Kasugadai Apartment line A61
      • To Nairiku Industrial Park line A62
      • To Aikawa Bus Center A63
  • Tokyo Office
    110-0016, 1-24-2, Taito-ku, Tokyo, Japan
  • By public transportation
    • Get off at Akihabara station of JR to walk 7 minutes
    • Get off at Suehirocho station of Tokyo Metro Ginza line to walk 9 minites