RYOWA CO.,LTD.

About RYOWA

MESSAGE FROM OUR PRESIDENT

Starting its business in September of 1982, RYOWA as a printed circuit board manufacturer has been making advancements in electronic devices.
We started our business by forming circuits with our process of exposure through etching.
Based on the circuit forming process, we have added processes for drilling, printing with solder resist and plating to extend our capabilities as a printed circuit board specialist.
I would like to express my sincere appreciation to our customers, suppliers and local communities for always supporting our corporate activities.
I also feel deeply grateful for the current teams and our senior members who have been advancing RYOWA through many different hardships.
In an industry where technologies are evolving daily, RYOWA intends to work consistently and steadily for further growth and for our purposes to “Pursue technological challenges”, “Customer first”, “Respect of the global environment”, “Contribute for better lives” and “Enhance humanity”.
Keeping full trust in our teams and keeping excitement to create new products in our minds, we hope to make progress together and make contributions to develop a better society.
Our teams and I look forward to hearing from you with any input and advise.

  • RYOWA CO.,LTD.
    President Tatsuya Gomi
  • 株式会社リョウワ 代表取締役 五味 達也 

CORPORATE PROFILE

Company Name RYOWA CO.,LTD.
Founded September 1982
President Tatsuya Gomi
Capital JPY 78,500,000
Employee 120
Office 245 Yonezawa, Chino, Nagano, Japan 391-0216  
TEL 0266-73-5470
FAX 0266-73-3803
Business Domain Manufacturing and sales of printed boards for semi-conductors
Annual business JPY 3,000,000,000
Major customers
  • Amkor Technology Japan
  • Mizusawa Semiconductor
  • Mitsutoyo
  • ADATA TECHNOLOGY CO., LTD.
  • ChipMOS TECHNOLOGIES INC.
  • FORMOSA ADVANCED TECHNOLOGIES CO., LTD.
  • Kwangmyung Semiconductor(Tianjin)Co.,Ltd
  • LINGSEN PRECISION INDUSTRIES, LTD.
  • UNIMOS MICROELECTRONICS SHANGHAI CO.,LTD
  • WALTON ADVANCED ENGINEERING, INC.
  • Other domestic and international assembly related companies
Financing banks
  • Hachijuni Bank
  • Mitsui Sumitomo Bank
  • Japan Finance Corporation
  • Suwa Shinkin Bank
  • Nagano Labor Bank (for employees)

CORPORATE POLICY

HISTORY

  • 1982. 9

    Makoto Gomi founded RYOWA KAKO in Yonezawa, Chino as a small business for forming circuits on chip-on-boards.

  • 1983. 4

    Incorporated as RYOWA
    Capital JPY 5,000,000

  • 1983. 6

    Moved the main factory to Tsukahara, Chino and started manufacturing chip-on- boards.

  • 1986. 4

    Acquired a property of 4,950 ㎡ and a building of 1,930㎡ in Yonezawa.

  • 1986. 8

    Completed renovating the building and moving the main factory to this building.
    Integrated a drilling factory in Fukuzawa to the renovated factory in Yonezawa to improve the production efficiency.

  • 1986.12

    Increased the capital to JPY 28,000,000.

  • 1995. 1

    Extended the factory site to 448㎡.
    Added a bonding gold plating line and various testing devices.

  • 1996. 8

    Acquired ISO9001.

  • 1997. 6

    Ken Gomi took up the post of president.

  • 1997. 9

    Added a second gold plating line.
    Increased the capital to JPY 78,500,000.

  • 2000. 4

    Finished building the main factory.

  • 2004.12

    Acquired ISO14001.

  • 2006.12

    Finished building a second factory.

  • 2011.7

    Started manufacturing 40 um thick printed circuit boards.
    Completed 30 um thick prototype printed circuit boards.

  • 2017.7

    Tatsuya Gomi took up the post of president.

  • 2017.7

    Dissolved and merged a subsidiary company Priken.