A police officer and friends with Onizuka. Was part of the Kamakura no Kyouken (The Mad Dogs of Kamakura) and a rival to Onizuka in his school days.
Toshiyuki Saejima currently a corrupt police officer in GTO but a former gang member first with Kamakura no Kyouken (The Mad Dogs of Kamakura), his own gang with his best friend Jun Kamata and then he joined the Oni-Baku. They were the most feared fighters in school as their methods were brutal, in one instance shoving a pencil up someone’s nose and using anything to win. They fought the Oni-Baku in an epic battle; they had kidnapped Ryuji and went to eliminate Onizuka. This backfired and lost to them and eventually decided to join them.