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 4F 5-3-4 Ueno, Taito-ku, Tokyo 110-0005 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 Suehiro-cho Station / 3-minute walk
 JR  Tsukuba Express  Tokyo Metro Hibiya Line Akihabara Station / 8-minute walk
 JR Okachi-machi Station / 8-minute walk
 Tokyo Metro Hibiya Line Naka-okachi-machi Station / 8-minute walk
 Tokyo Metro Chiyoda Line Yushima Station / 12-minute walk
 Toei Oedo Line Ueno-okachi-machi Station / 12-minute walk
 Toei Shinjuku Line Iwamoto-cho Station / 12-minute walk