Clothing retailer Aoki Holdings, which is embroiled in a Tokyo Olympic Games sponsorship bribery case, allegedly gave money to the former president of the Games organizing committee Yoshiro Mori, a source close to the matter said Thursday.

Tokyo prosecutors are investigating the purpose and the timing of the suspected payment to Mori, a former prime minister, who stepped down as head of the committee months before the Summer Games after it was revealed he made sexist remarks, the source said.

The funds could have been get-well money for Mori, who was battling cancer, the source added.