Aya Koyama (小山 亜矢, Koyama Aya, 8 March 1973 – 27 August 2018), better known by her stage name Aliya (亜利弥’), was a Japanese female mixed martial artist and a professional wrestler.

[4] In 2001, she took a brief break from professional wrestling to focus in the mixed martial arts.

She began competing professionally in MMA from May 2001 and lost her opening match to Anna Kopyrina (on 3 May 2001).

[7] She fought her last MMA match while she was battling with level 4 cancer on 10 October 2010 following her comeback to mixed martial arts after six years and lost it to Miki Morifuji.

[8] Aya Koyama died on 27 August 2018 at the age of 45 due to cancer.