When Taiji was two years of age, he shoved his hand into a machine in a factory where his parents worked, resulting in a first joint cut on the middle finger, but luckily, it was not too serious.

[2] Until 1986 when he joined the very short-lived Dead Wire, whose line-up also included future Saver Tiger and D'erlanger members, Kyo and Tetsu.

In July 1994, he formed his own band and named it D.T.R, which stood for "Dirty Trashroad" and featured Mitsuo Takeuchi (ex:Joe-Erk) on vocals, Taiji Fujimoto (ex:The Dead Pop Stars, ex:Judy and Mary) on guitar and Toshihiko Okabe on drums.

[5] In 1995, he also joined the short-lived supergroup Kings, with Shuichi Aoiki (Night Hawks) on vocals, Luke Takamura (Seikima-II) on guitar, and Satoshi "Joe" Miyawaki (44 Magnum, Spread Beaver) as support drummer.

Guitarist Tomoyuki Kuroda later joined D.T.R in 1995, but a year later, Yoshihiko left, and then the band was put on hold when Taiji was going through personal problems.

[citation needed] D.T.R resumed activity in 2006 with keyboardist Kenji Shimizu and their former support drummer Kazuhisa "Roger" Takahashi, now official members.

[4] In 2009, he announced that he would once again be playing bass in a supergroup, The Killing Red Addiction with guitarist Tatsu (Gastunk), drummer Kenzi (Anti Feminism, The Dead Pop Stars, ex:Kamaitachi) and vocalist Dynamite Tommy (ex: Color).

[8] Their second performance was in Osaka, Japan at the Shinjuku Loft on December 29, and they released a cover of Gastunk's "Devil" on iTunes on January 13, 2010.

[12][13] On October 9, it was announced that Dai was leaving TSP, and would be replaced by Hiroshi "Tazz" Maruki, which resulted in their debut album being delayed.

On July 11, 2011, Taiji argued with his female manager, named KT, on Delta Airlines Flight 298 during the final approach from Japan to Saipan.

[15] On July 14, Taiji was found unconscious in his detention cell, appearing to have attempted suicide by hanging himself with a bed sheet.