Mizuno Yoshiki is the guitarist and leader of the Japanese pop band Ikimonogakari. He also provides vocals in a few songs. He is in charge of the song writing along with Yamashita Hotaka, and usually writes the single's A-sides.
- Name: Mizuno Yoshiki (水野良樹)
- Nicknames: Yocchan, Yoshiki, Leader
- Birthdate: December 17, 1982
- Birthplace: Hamamatsu, Shizuoka Prefecture, Japan
- Blood Type: A
- Height: 168 cm
- He was classmates with Yamashita Hotaka and Yoshioka Kiyoe's brother.
- He can take up to thirty days to write a song while Yamashita takes only thirty minutes.
- He is a baseball fan, and his favorite team is the Yomiuri Giants.
- He can also play the piano.