Tokyo Shoseki Media Factory

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Tokyo Shoseki Media Factory (株式会社東京書籍メディアファクトリー), commonly abbreviated TMF, was a subsidiary of publishing company Tokyo Shoseki established March 3, 1997 to take over that company's game publishing operations under the Tonkin House brand. It had an internal development team that appears to have been headed by Masaki Sakari (盛政樹), who along with much of the other staff had previously worked at Data East. The company was renamed to Tokyo Shoseki Media Flow (株式会社東京書籍メディアフロー) in 2000.

Tokyo Shoseki, and by extension TMF, ceased all games-related business in 2004. TMF was rechristened Edufront (株式会社学習調査エデュフロント), which today specializes in educational software system development. Most of the games staff, including Sakari, joined 5pb.


  • Blend x Brand (JP Publisher: Tonkin House)
Sound Effects, Sound Programming: Kinniku Sound
  • L no Kisetsu: A piece of memories (JP Publisher: Tonkin House)
Graphics, Animation Production: Studio Hibari; Sound: Two Five, Cube
  • Shinshuku Taisen: It's a Nony! (JP Publisher: TMF)
Background Graphics: Plans House

PlayStation 2

  • D→A:BLACK (JP Publisher: Tonkin House)
  • D→A:WHITE (JP Publisher: Tonkin House)
?: ISCO, Digitalware
  • Missing Blue (JP Publisher: Tonkin House)