Moon Child is a 2003 Japanese science fantasy horror action film starring Gackt, Hyde, and Leehom Wang. It was released on April 19 in Japan, and screened on May 13 at the Cannes Film Festival and on April 12, 2004, at Philadelphia Film Festival. In November 2023 for its 20th anniversary it was re-screened nationwide in Japan. The movie's story is adaptation of Gackt's original story related to his "Moon Saga" concept. Although the original story is about a vampire and his friends, it "reverses the concept of marginalised Asians living illegally in Japan to that of a group of marginalised Japanese renegades hiding out in a fictional futuristic city on the Asian mainland, named Maleppa, following Japan's economic collapse in the opening decades of the 21st Century".

Gakuto Oshiro , better known by his mononymous stage name Gackt, is a Japanese singer-songwriter, musician, record producer and actor.