Wakana Koga (born 28 June 2001) is a Japanese judoka.

She won the silver medal in the women's 48 kg event at the 2021 World Judo Championships held in Budapest, Hungary.

[3] Koga won one of the bronze medals in her event at the 2022 Judo Grand Slam Paris held in Paris, France.

[4] Koga won one of the bronze medals in the women's 48 kg event at the 2023 World Judo Championships held in Doha, Qatar.

This biographical article related to Japanese judo is a stub.