On January 30, it was reported that Chiba Prefecture police transferred the 2021 Tokyo Olympics table tennis men's team bronze medalist and 30-year-old table tennis player Takaki Niwa to the procuratorate on the 29th on suspicion of gambling through overseas online casino websites. It is believed that during voluntary questioning, he admitted to the charges, saying he had made bets in predicting the outcome of a sports match. Competitor Niwa said in an interview with Kyodo News Agency: "I didn't know it was illegal and I feel very regretful. I'm sorry, my fans." According to investigators, the Japanese police have attached opinions requiring strict handling. The accusation is: In the early summer of 2023, players from Dan Yu entered the online casino website through a domestic Internet connection and used cryptoassets (virtual currency) to gamble.