The chief of the Japanese Olympic Committee will hold a news conference on Tuesday to address allegations of his involvement in a corruption scandal.
French prosecutors are investigating JOC President Tsunekazu Takeda for suspected bribery in relation to Tokyo's successful bid to host the 2020 Olympics and Paralympics.
Prosecutors placed Takeda under formal investigation last month, with the probe focusing on payments made by Tokyo's bid committee to a company in Singapore in 2013.
More than two-million dollars were paid to the firm in consultancy fees.
A French judge has been considering whether to proceed with a trial since December, based on the findings of the prosecutors' investigation.
In Japan, an in-house investigation team launched by the JOC in 2016 questioned bid committee members and concluded that it found nothing illegal with the payments.
Takeda has repeatedly said that he has done nothing illegal and will cooperate with the French investigators.
He is expected to deny the allegations again at Tuesday's news conference in Tokyo.