Former Tokyo Olympic organizing committee executive Haruyuki Takahashi was arrested by prosecutors earlier this month on allegations that he received ¥51 million in bribes in exchange for giving apparel-maker Aoki Holdings special treatment in becoming a sponsor of the Games.

The ongoing investigation has once again put the spotlight on the role of money in large sporting events such as the Olympics, and is being watched closely in Sapporo, which is bidding to host the 2030 Winter Olympics and Paralympics.

On Friday, the Tokyo District Court approved an extension on the detainment period for Takahashi and three others until Sept. 6 as prosecutors seek to unravel what happened.