Conversation so far:
What was Jin Akanishi's first band?
After Jin Akanishi was made a Johnny's Jr. member in 2000, Akanishi was part of a number of groups before being drafted into a six-member unit with KAT-TUN.
Any notable songs with Jin Akanishi's KAT-TUN?
Jin Akanishi was also a songwriter for the group, having written songs for KAT-TUN and for himself, including Hesitate, Love or Like, Lovejuice, Care, and Wonder.
What happened next with Jin Akanishi's Johnny's Jr.?
Much to the Japanese public's surprise, Jin Akanishi announced in a press conference on October 13, 2006, that he was leaving the country to study English abroad.

Question: Was he with another band?
Self-contained rewrite: Was Jin Akanishi with another band besides KAT-TUN?