OSG is a company which operates with an audit committee and has segregated clearly the president and directors from business execution.
Ultimate authority over business executions rest with officers including chief executive officer. The board does however retain a supervisory capacity.
The majority of directors on the board are outsiders in an effort to establish adequate governance and accountability from the perspective of stockholders.

Board of Directors (Supervisory Role)


  • Norio Ishikawa


  • Nobuaki Osawa

Director (Audit & Supervisory Committee Member)

  • Takehiro Tomiyoshi
  • Akito Takahashi(Outsider)
  • Kunihiko Hara(Outsider)
  • Kayoko Yamashita(Outsider)
  • Yoshitsugu Hayashi(Outsider)

Corporate Officer System

Chairman & Chief Executive Officer

  • Norio Ishikawa

President & Chief Operations Officer

  • Nobuaki Osawa

Managing Officer

  • Jiro Osawa
  • Hideaki Osawa
  • Koji Takeo

Senior Executive Officer

  • Mitsuyoshi Hikosaka
  • Yasutaka Yoneda
  • Yukinori Chikada

Executive Officer

  • Jeffrey Tennant
  • Toshihiro Hisadome
  • Yasushi Suzuki
  • Kenya Sugihara
  • Seungjin Chung
  • Osamu Ishida
  • Hitoshi Masuoka
  • Koji Agata