- Before he joined, Yoshiki and him lived together. Yoshiki said he had to ask Taiji to put the cap on the tooth paste tube every single morning.
- In 1992, he is fired.
- Why does he quit X? Taiji strongly asserted the equalitarism in the management of X.
- Which means equality in both; work and money. Especially from the work side, Taiji complained to Yoshiki that some good songs he wrote with hide weren't accepted on the album 'Blue Blood'.
- At that time, he was also arrested for charge and injury.
- Finally, Taiji was fired from X by Yoshiki, when he started asserting about the equity of royalties on Cd, video and so on.
- One last reason was that X doesn't needed 2 leaders. Taiji had strong opinions about management of X, way to write or songs arrangement etc. he often clashed with Yoshiki. Taiji assumed in his autobiography that Yoshiki was too tired to argue with him.
- At that time, many rumors are spread annoncing the near death of X, saying the band would not survive with the bassist gone. Yet X-Japan would gave us 5 other years of great music and show.
- After he quitted X, he joined the band Loudness, but quitted them a short time after that.
- In 1994, Taiji formed his own band named DTR. But it didn't work well and they broke up.
- In the same year, Taiji divorced from his wife and starts wandering through Japan.
- He said he tried to kill himself two times, but couldn't make it..
- In 1998, Taiji went to hide's funerals and met the members of X, which he met for the first time since he quitted them.
- After all that, Taiji decided to live as a musician again, he joined the tribute album of Cozy Powell.
- On May 2000, Taiji released his autobiography.
- Taiji's new band is named Cloud Nine.