Yoshiro Mori, president of the Tokyo Olympic organizing committee, shot down accusations of plagiarism over the logo for the 2020 Summer Games on Monday, saying he is "confident" no changes will have to be made to the design.

"We've taken all the steps we've had to take without fail," Mori said. "I think I can say this with absolute conviction, (and) we're confident we will continue to use it."

The logo by Kenjiro Sano, selected from 104 applicants, came under fire when Belgian designer Olivier Debie claimed it resembles the emblem he designed for a theater in Liege.

Debie is threatening legal action in a Belgian court against the International Olympic Committee and Tokyo 2020 if the logo is not retracted.

Sano last Wednesday refuted Debie's charge, denying the design was stolen.

"The decision of the logo was taken by experts in the artistic field, and if there were issues of plagiarism it would have been identified during the decision-making process," Mori said.