: During his middle school years at Takeishi Junior High, Mitsui was a star basketball player. During a high-stakes championship game where his team trailed by one point with only nine seconds left, he nearly gave up.
: During a freshman practice session, Mitsui pushed himself too hard and suffered a severe knee injury. Slam Dunk (Dub) Episode 26
: Because of his profound respect for Coach Anzai, Mitsui chose to attend Shohoku High School to play for him, turning down offers from prestigious basketball powerhouses. The Turning Point : During his middle school years at Takeishi