Ayaka Hamasaki

 ( 1982 Births ) 

At Jewels 11th Ring on , Hamasaki defeated Sakura Nomura after three competitive rounds via unanimous decision in the Lightweight Queen tournament semi-finals. In the same event, Hamasaki defeated South Korean Seo Hee Ham by unanimous decision, surprising commentators by holding her own in the striking exchanges against the experienced Korean kickboxer. Hamasaki won the tournament in the process and became the first Jewels Lightweight (115 lbs) Queen Champion.

Hamasaki was scheduled to face Lisa Ellis in a non-title bout at Jewels 12th Ring on in Tokyo. However, Ellis suffered a calf injury and was forced to withdraw from the fight. Hamasaki was then set to face Jessica Aguilar at 12th Ring instead, but the event was cancelled after the Tōhoku earthquake and tsunami earlier in the day.

Hamasaki faced Mizuki Inoue in a non-title bout at Jewels 16th Ring on in Tokyo. She defeated Inoue by unanimous decision.

Hamasaki defended her Jewels title in a rematch against Seo Hee Ham at Jewels 17th Ring on . She won the fight by TKO (corner stoppage) after the first round when Ham could not continue due to injury.

Hamasaki faced Yuka Tsuji in a Jewels title fight at Jewels 19th Ring on in Osaka, Japan. She won the fight by submission due to a kimura in the first round.

Hamasaki was expected to face Carla Esparza at Invicta FC 4 in January 2013. However, Hamasaki withdrew from the fight in order to defend her Jewels title. She faced Emi Fujino at Jewels 22nd Ring on and defeated Fujino by unanimous decision.

Hamasaki agreed to face Carla Esparza for the Invicta FC Strawweight Championship at on , but Esparza withdrew due to a knee injury. Hamasaki was then matched up against Cláudia Gadelha. She was defeated by TKO in the third round.

Hamasaki made her first title defense against Amber Brown at on March 11, 2016. She successfully defended the title via third-round submission.

Her second title defense took place against Jinh Yu Frey at on September 23, 2016. She won the fight and retained the title via second-round doctor stoppage.

She then faced Lívia Renata Souza in a strawweight bout at on March 25, 2017. She lost the fight via first-round knockout.

Later in 2017 Hamasaki vacated her Invicta FC Atomweight title and subsequently signed with Rizin Fighting Federation.

Ayaka defended her title for the first time against Invicta FC Atomweight Champion Jinh Yu Frey at on June 2, 2019. Ayaka won the fight via unanimous decision.

Ayaka faced Suwanan Boonsorn in a non-title bout on August 18, 2019 at RIZIN 18. She won the bout easily via first round armbar.

Ayaka faced former Road FC Women's Atomweight Champion Seo Hee Ham at Rizin 20 on December 31, 2019. She lost the trilogy fight via split decision, losing the Rizin Women's Super Atomweight Champion in the process.

On August 9, 2020, she faced Tomo Maesawa at Rizin 22 and won via second round kimura.