A consulting firm for the Tokyo Olympic bid committee transferred some ¥37 million ($370,000) to the son of one-time influential IOC member Lamine Diack and his company before and after the Japanese capital was picked in September 2013 as the host city, documents showed Sunday.

The findings, based on a review of financial documents and further reporting, may help resolve the question of what happened to the money from the consulting firm and shed further light on the allegation that the Tokyo bid committee engaged in vote-buying.

Black Tidings Co., the now-defunct consulting firm based in Singapore, received a total of ¥230 million ($2 million) from the bid committee paid into a bank account in the city-state in July and October 2013. The then-chief of the Japanese committee confirmed the payment but denied any wrongdoing.