Pressure from the International Olympic Committee is believed to have been a factor in the Japanese Olympic Committee president's retirement.
On Tuesday, Tsunekazu Takeda said he will step down when his term expires in June. Takeda is under investigation by French authorities over corruption allegations in connection with Tokyo's successful bid for the 2020 Games.
The IOC had initially taken a stance of watching developments related to the matter, citing the principle of presumption of innocence. But it conveyed strong concern to Japanese officials about a negative impact on the Tokyo Games and the IOC.
The committee says it has made integrity an important value and stepped up its code of ethics for Olympic hosting bids due to allegations of bribery and excessive entertaining for IOC members.
But the chief of Brazil's Olympic Committee, who also headed the bid committee for the 2016 Rio Games, was arrested on suspicion of bribery after the event. Indictment of Takeda as the incumbent JOC president would deal a severe blow to the IOC.
Japanese officials received information that IOC President Thomas Bach may cancel his attendance at an event in Japan in July to mark one year before the Tokyo Games.
The IOC's attitude has prompted many of those who supported Takeda to see his retirement as inevitable.