Mei Yamaguchi (山口 芽生, yamaguchi mei; born (1983-02-03)February 3, 1983), formerly known by her ring name V Hajime (V一, vī hajime), is a Japanese female mixed martial artist and kickboxer. Her former nickname comes from the V1 armlock wrestling move. Yamaguchi currently fights as a Super Atomweight in the Rizin Fighting Federation promotion. She has a notable victory over Yuka Tsuji and was the final Valkyrie Featherweight Champion. She has also competed in Deep Jewels and ONE Championship. She is currently ranked #5 in the ONE Championship Women's Atomweight rankings. On February 5, 2011 (2011-02-05), Yamaguchi announced that she would begin competing as a freelance fighter and changed her ring name to V.V.
Source: “Mei Yamaguchi”, English Wikipedia (CC BY-SA 4.0), excerpt