Nintendo boss-man has told investors that his firm's performance at E3 earlier this summer simply wasn't good enough. Most critics were of the opinion that Microsoft's briefing stole the show, and perhaps Iwata agrees.

"As for the media briefing at E3, of course we had many internal discussions after that," Iwata explained.

"Honestly speaking, none of us at thought that our presentation at E3 was as good as it could have been. It is apparent that we could not fully convey the charm of our products."

He added that demonstrating motion-controlled games on stage is a difficult thing to pull off, noting that New Super Bros on the wasn't done justice by the presentation in Los Angeles.

By Luke Guttridge