"Mirrorcle World" is the forty-third physical single and forty-fourth single overall by Japanese singer Ayumi Hamasaki. The title track is an extended version of the song "Mirror," a two-minute introductory track on Hamasaki's ninth studio album, Guilty. The single was released on April 8, 2008, exactly ten years after her debut single, "Poker Face"; the single features two new recordings of her second and fifth singles, both released in 1998, "You" and "Depend on You," respectively.

Ayumi Hamasaki is a Japanese singer, songwriter, record producer, actress, model, spokesperson, and entrepreneur. By 2002, Hamasaki had earned the nickname "Empress of J-pop" due to her popularity in Japan and throughout Asia, as well as being referred to as "the voice of the lost generation". Due to her success and relevance throughout her career, she is considered one of the top solo female artists of the Heisei era for her influence on the music industry and various fashion trends.