Four-time world champion Daiya Seto, who resigned as captain of Japan's Olympic swimming team after an extramarital affair, won the Japan Open men's 400-meter individual medley on Thursday in his first competition since September.The 26-year-old was suspended until the end of 2020 as punishment for an affair exposed by a gossip magazine, but he avoided being cut from Japan's team for the Tokyo Olympics.In September, he was photographed at a "love hotel" with a woman who is not his wife."I'm sorry my actions let down those people who had been supporting me," Seto said after the race at Tokyo…READ FULL ARTICLE