Wakana Koga (born 28 June 2001) is a Japanese judoka. She won the women's 48 kg event at the 2026 World Judo Championships held in Baku, Azerbaijan. In the final, she defeated previous champion Assunta Scutto. She also is a runner-up at the 2021 Championships, as well as two bronze medals at the 2023 and 2025 editions. Koga won one of the bronze medals in her event at the 2022 Judo Grand Slam Paris held in Paris, France.
Source: “Wakana Koga”, English Wikipedia (CC BY-SA 4.0), excerpt
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