Ayako Valentina Hamada Villarreal is a Mexican professional wrestler. During her 20-year career, Hamada wrestled for various promotions, including All Japan Women's Pro-Wrestling, Gaea Japan and Pro Wrestling Wave in Japan, Consejo Mundial de Lucha Libre (CMLL) and Lucha Libre AAA Worldwide in Mexico and Shimmer Women Athletes and Total Nonstop Action Wrestling (TNA) in the United States. She is the daughter of Gran Hamada and the younger sister of Xóchitl Hamada.

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.