(光永淳造) Mitsunaga Junzo (or Jyunzo), b. 1974 in Okayama prefecture, is a Japanese professional Go player of the Nihon Kiin. As an amateur, he won the Japan High School Championship (Team) together with Sakai Hideyuki and one other player.
- 1999 - 1p
- 2009 - 6p