Mayumi Someya (æÂÂè°· çÂÂæÂÂç¾Â, Someya Mayumi, born 30 May 1993) is a Japanese karateka. At the 2018 World Karate Championships held in Madrid, Spain, she won the silver medal in the women's team kumite event. She represented Japan at the 2020 Summer Olympics in the women's 61 kg event.
She is the younger sister of Kayo Someya, also a karateka and a colleague of Japan's national karate team.