The AAAW Single Championship or AAAW Championship is a women's professional wrestling championship formerly contested in the Japanese women's professional wrestling promotion Gaea Japan until 2005 after the promotion was closed down. Originally a heavyweight championship, the weight class was dropped in 1998, making it an openweight title. On March 12, 2021 it was announced that the AAAW Singles Championship would be revived, along with the AAAW Tag Team Championship, at the GAEAISM show on April 29. It was revived in January 2022 and began being sanctioned by Marvelous That's Women Pro Wrestling ever since.

Mio Momono is a Japanese professional wrestler currently working for Marvelous That's Women Pro Wrestling. She is best known for her time with the Japanese promotions Pro Wrestling Wave, Sendai Girls' Pro Wrestling and Ice Ribbon.