Ayaka Miyauchi (born 14 June 1983) is a Japanese Nak Muay and kickboxer.
Miyauchi made her professional debut in 2007 during the 2007 CUB☆KICK'S-8 against Tomoko Kurimitsu, when she won a unanimous decision.
In the quarter-finals she defeated Yuka Okamura, and in the semi-final bout won the rematch with Mayumi.
Later in the year, she entered the J-Girls Founders Tournament, which she managed to win with unanimous decision victories over Marie Nakanaka, Mai and Junko Yamada.
Ruumet kept her at distance with a combination of low and middle kicks, as well as through straight punches, leading Rummet to a unanimous decision win.