Tsunekazu Takeda, chairman of Japan's Olympic Committee, may step down without a second term as the French authorities open an investigation into his connection to allegations of corruption related to the 2004 Tokyo Olympics, NHK report said.
The Japanese Olympic Committee elects a new president in June at its regular meeting every two years, but a committee official and others close to the matter said the chance of confirmation in another period was slim because of the investigations.
Takeda, who has headed the Japanese committee since 2001, should resign, according to other sources.
The Japanese Olympic Committee said it had "not decided anything" without adding any further comment. The Tokyo Organising Committee for the Tokyo Olympics 2020 declined to comment on the matter.
French investigators have opened investigations into more than $2 million paid by the bid committee to host the Tokyo Olympics to a Singapore consulting firm.
A judicial source told Reuters the French prosecutor suspected that Takida paid bribes to ensure his country won the Olympics. Takeda was questioned in Paris in December and placed under investigation.
Takeda, who headed the committee for the organisation's request, denied any wrongdoing and said there was nothing abnormal in contracts between the committee and the Singaporean company and that the work was legal.
The IOC's Values Committee opened an investigation into Takeda, a member of the IOC and chairman of the marketing committee.
Takeda was re-elected Vice-President of the Asian Olympic Council earlier this month.