Company name JDN Inc.
Summary JDN means Japan Design Net.
We have been making internet media since Sep. 1997.
Our origin is a new business project of TANSEISHA Co., Ltd.
From Feb. 2009, We changed our platform to TmG Inc. that is a consolidated subsidiary of TANSEISHA Co., Ltd.
At 1st Feb. 2012, TmG Inc. has been renamed JDN Inc.
JDN Inc. is still a consolidated subsidiary of TANSEISHA Co., Ltd.
President MIYAUCHI Shingo
Director YAMAZAKI Yasushi
Address H1O Kanda 306, 41-1 Kanda-Higashi-Matsushitacho, Chiyoda-ku, Tokyo, 101-0042 JAPAN
Contact Click here to a Inquiry form


Connecting design and business by information.
Spreading smile and energy over people and society.

Mission Statement

  • 1 Feel with 5 sences
  • 2 Be proud of and be responsible for our work
  • 3 Put our heart
  • 4 Make objections
  • 5 No challenge, no success


 Tokyo Metro Ginza Line Kanda Station / 2-minute walk
 JR Kanda Station / 4-minute walk
 Toei Shinjuku Line Iwamoto-cho Station / 4-minute walk
 Tokyo Metro Hibiya Line Akihabara Station / 7-minute walk
 Tokyo Metro Marunouchi Line Awaji-cho Station / 8-minute walk