- Nickname: Jun Jun
- Birthday: October 23, 1984
- Age: 34
- WACK founder, A&R Manager, and producer
Watanabe is married.
He attended one of the leading schools in Tokyo, but he stopped attending in second grade of junior high school. In senior high school, he dropped out.
At this time was organising a band and was confident they would be able to debut.
When the band dissolved, he began to think about a career in music. Because his felt having an education is important, he took the university entrance exam and started studying at Waseda University of Political Science and Economics.
In university, he met Matsukuma Kenta and they’ve remained close friends. Matsukama is managed by WACK, and also acts as the sound producer for the groups.