Yoake no Mariko is a rhythm video game developed and published by Sony Computer Entertainment for the PlayStation 2. It is a collaboration between Sony and Spümcø, an American animation studio best known for producing Nickelodeon's The Ren & Stimpy Show, with founder John Kricfalusi serving as a character designer. Keiichiro Toyama, who joined Sony two years prior, serves as a gameplay designer; it was released on the same day as Ico, developed at another unit of Sony.