GTO: Great Teacher Onizuka Main cast, played by Shun Oguri Episode 1x02: Great 2 (Jul 14, 1998) Episode 1x03: Great 3 (Jul 21, 1998) Episode 1x04: Great 4 (Jul 28, 1998) Episode 1x05: Great 5 (Aug 4, 1998) Episode 1x10: Great 10 (Sep 8, 1998) Episode 1x11: Great 11 (Sep 15, 1998) Episode 1x12: Great 12 (Sep 22, 1998)