Trading Company Specialized in Electronics and the Leading Manufacturer of Heat Sink - Ryosan Company Ltd.
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Ryosan Company, Limited Company information
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Corporate Data
Name of Company
Head QuarterRyosan Company,Limited
Date of Establishment
November 18, 1953
Areas of Business
Sale of semiconductors, electronic components and electronic devices;
Development, manufacturing and sale of Ryosan products (heat sinks)
Capital
17,690 million yen
Head office
2-3-5, Higashi-Kanda, Chiyoda-ku, Tokyo, 101-0031, Japan Head office Access Map
Number of Employees
675 (Consolidated: 1,088) As of March 31, 2010
Stock Listings
Tokyo Stock Exchange, First Section, Code:8140
Fiscal Year End
March 31
Board of Directors and Corporate Auditors
President and Representative Director Naoto Mimatsu
Senior Managing Director Harumitsu Seki
Managing Directors Hiroshi Shibuya
  Katsuyuki Suzuki
  Isao Hayashi
  Itsuto Hamasaki
Directors Toshifumi Sakata
  Tsuyoshi Koyama
  Satoshi Takabayashi
  Takeshi Honda
  Koji Honma
Auditors Naotsugu Kasuya *
  Yukio Tanaka *
  Tsuneo Sato
  Kotaro Nakano
  *Full-time corporate auditor
Main Banks
Sumitomo Mitsui Banking Corporation
The Bank of Tokyo-Mitsubishi UFJ,Ltd.
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