Company Data

Company Data

P.R.A. was founded in January, 2004, since then we have been doing business with large companies as a leading company in manufacturing, repairing and updating semiconductor manufacturing equipment.

Using professional engineering capability, we are working on prolonging the life and upgrading efficiency of semiconductor manufacturing equipment which operates in our client’s factories.

P.R.A. provides in house repair services of various RF products, including Comdel RF generators. We also provide customers technical solutions, such as optimization and upgrade of parts, to enhance product reliability.


Company’s Profile

Company name P.R.A. Co.,Ltd.(Plasma Related Alliance)
Established in 19th January, 2004
Capital 10 million yen
Top management Takashi Ikehata
Head Office 8-33-3  Minoridai, Matsudo-shi, Chiba 270-2231 
TEL:047-369-3389 FAX:047-369-3317
Second factory 6-6-10 Minoridai, Matsudo-shi, Chiba 270-2231 
TEL:047-393-8037 FAX:047-393-8068
Osaka office #1 Shinobugaoka-mansion, 1-6-31  Takakura, Neyagawa-shi, Osaka 572-0864 
TEL:072-803-7595 FAX:072-803-7596
Kyushu office #103 Grace-terrace, 2601-4 Kubota, Kikuyomachi, Kikuchigun, Kumamoto 869-1103 
TEL:096-285-7289 FAX:096-285-7290
Nagoya office #1 Ai-Building, 1-4-7 Jyosai, Nishi-ku, Nagoya-shi, Aichi 451-0031 
TEL:052-715-9135 FAX:052-715-9136
Employees 32名
Business Design and manufacture peripheral equipments of semiconductor.
Repair DC, RF generators.
Upgrade specs of matching network, generators, and so on. 

Corporate History

January, 2004 P.R.A. established.
simultaneously signed an agency agreement with Comdel Inc.
November, 2010 Sendai office established.
February, 2011 Kyushu office established.
July, 2011 Chiba head office ISO9001-2008 certified.
April, 2012 Chiba head office building relocated.
August, 2012 Osaka S.C. established.
December, 2015 経営革新計画(Innovation management plan) was approved.
July, 2016 ものづくり補助金(manufacturing subsidy) in 2015 was approved.  Theme :  Matching network development.
July, 2016 ちば元気づくり助成事業(Chiba genki-dukuri subsidy) in 2016.  Theme : Electrotatick chuck(ESC) power supply development.
September, 2016 Due to business expansion, Second Factory established near Chiba head office.
February, 2017 Public Interest Incorporated Foundation “Himawari venture fund” was approved.
April, 2017 ものづくり補助金(manufacturing subsidy) in 2016 was approved.  Theme :  Building a mass production system of original products.
June, 2017 ちば元気づくり助成事業(Chiba genki-dukuri subsidy) in 2017.  Theme : .Exhibition to SEMICON JAPAN 2017.
October, 2017 Nagoya office established.
January, 2018 千葉ものづくり認定製品(Chiba manufacturing qualified product) in 2017 was approved.
May, 2019 Osaka office relocated.
October, 2021 Nagoya office relocated.
March, 2022 Increased capital to 20 million yen.
April, 2024 Became a subsidiary of Kanematsu PWS Ltd.
May, 2024 Changed Representative Director.
Katsumi Sakamoto, Representative Director, appointed as Director CTO.
Takashi Ikehata, Director, appointed as Representative Director.

Main Customer

  • Japan Semiconductor Corporation
  • Renesas Semiconductor Manufacturing Co., Ltd.
  • Sony Semiconductor Manufacturing Corporation
  • Texas Instruments Japan Limited
  • Kioxia Corporation
  • TowerJazz Panasonic Semiconductor Co.,Ltd.
  • LAPIS Semiconductor Co., Ltd.
  • ROHM Co., Ltd.
  • TOSHIBA Electronic Devices & Storage Corporation
  • Kaga TOSHIBA Electronics Corporation
  • Micron Technology, Inc.
  • Sharp Corporation
  • ON Semiconductor AIzu Co.,Ltd.
  • Japan Display Inc.
  • DISCO Corporation
  • Asahi Kasei Microdevices Corp.
  • Mitsubishi Electric Corporation

Quality Policy

(1) We offer services of the maintenance of semiconductor manufacturing equipment with the motto of high-quality, fair price and quick turn.
(2) We continuously improve the efficacy of QMS to achieve our quality policy. We strive for the development and prosperity of an organization and contribute to society. 
(3) We comply with laws and try to differentiate ourselves by improving our technology.

Top Message

株式会社P.R.A. 代表取締役社長 坂本 勝己

Further challenge as a total solution company in plasma technology

P.R.A has been working on cutting-edge technologies as a leading company in the field of manufacturing, repairing and updating semiconductor manufacturing equipment.

With the motto of” don’t repair the products but provide upgrade,” we have been garnering immense praise for our service that reduces cost by solving primordial matter and prolonging a product life instead of spot repair (from our clients).

By taking advantage of our technology that we have cultivated, we also manufacture high performance phase shifter, ESC power supply, Matching network.

Using our overall knowledge and technology not only in hardware but plasma application, electronics, vacuum and software, we as a whole are challenging and making an effort as a total solutions company in plasma technology.




Head office

Osaka office

Kyushu office

Nagoya office

Please feel free to contact us if you have any problems with plasma.

  • +81-47-369-3389
  • Contact by FAX:+81-47-369-3317
  • Contact Form


Please feel free to contact us.


Contact by FAX:+81-47-369-3317

Contact Form

ISO9001:2015 認証取得 2017年7月 千葉本社取得