The David Mitchell Universe Wikia

Mr. Ikeda used to be one of Quasar's childhood school teachers. According to Quasar, instead of defending him from bullying classmates, at one point he joined in a game where everyone was pretending that Quasar had died.

Satoru and Koji also had sports classes taught by Mr. Ikeda. Koji once accidentally flung a baseball bat into his face.

In Number 9 Dream Mr. Ikeda is Miyake's sport's teacher and soccer coach.