Japanese musician Keigo Oyamada resigned on Monday from the creative team for the opening ceremony of the Tokyo Olympics after admitting that he bullied children with disabilities many years ago, in the latest scandal rocking the already unpopular Games.

The resignation of Oyamada, who was in charge of composing music, comes just before Friday's opening ceremony after sparking an outcry on social media for his past actions, with his recent apology failing to ease the uproar online questioning the appropriateness of his role in the Tokyo Olympics and Paralympics.

Oyamada, 52, said on Twitter Monday that his acceptance of the request to be part of the team was something that "lacked consideration to various people," and that he had "offered (his) resignation to the organizing committee."