Natsumi Tsunoda shrugged off an injured back to win a gold medal Wednesday, scoring a convincing victory over South Korean Park Da-sol in the women's 52-kg class on the first day of the judo competition at the Asian Games.

While Tsunoda, the 2017 world silver medalist, had a clear ippon victory against the unheralded Park, Japan's three other judoka competing in finals the same day had to settle for silver at the Jakarta Convention Center's Plenary Hall.

Ami Kondo fell in the golden score to Rio Olympic silver medalist Jeong Bo-kyeong at 48 kg, while men's judoka Toru Shishime and Joshiro Maruyama lost their respective finals to Uzbekistan's Diyorbek Urozboev and South Korea's An Baul at 60 kg and 66 kg.