Onigiri is an action massively multiplayer online role-playing game (MMORPG) by CyberStep. It is set in a fantasy land reminiscent of ancient Japan in which humans and non-humans such as Oni and other Yōkai coexist. The game was originally released in Japan on February 6, 2014 and in North America on July 1, 2014. The English console versions were released on October 2, 2015 for the Xbox One, on October 6, 2015 for the PlayStation 4 and January 31, 2019 for Nintendo Switch. The game's title means "oni cutter", reflective of the player characters' background as an Oni; the title can also be taken as a pun on onigiri, the Japanese rice ball. As of July 31, 2020, the Xbox servers were shut down and the game was removed for purchase from the Xbox store; however, Onigiri remains supported on other platforms.

Starmarie are a Japanese Idol Group consisting of Nozomi Kishita, Shino Takamori, Monya Nakane, Hiroka Matsuzaki and Kaede Watanabe. Formed in July 2008 as a three-member idol group under M-SMILE, they have since become a five-member group. The group is famous for performing theme music for anime such as Cardfight!! Vanguard G and Onigiri.