Ojanko High School is a "strip mahjong" game in which the player battles six high school girls, three odd-looking men, and Soh Takeko, who will later appear as a major boss in Sonic Wings 3. The game also features several characters from Rabio Lepus: Kotomi Kitashirakawa as Kitayama Fuyumi, Komomo Kitashirakawa as Takano Izumi, and Taro Kitashirakawa as the high school's principal.
- Atrocious High School Student (Han Kuanaju)
- Horikawa Ryoko
- Iwakura Mayu
- Kitayama Fuyumi (Kotomi Kitashirakawa)
- Kyobashi Junko
- Mahjong Wizard
- Oji-san the Janitor (Ōtawara Torakichi)
- Takano Izumi (Komomo Kitashirakawa)
- Sanjo Hitomi
- Soh Takeko
- Principal (Taro Kitashirakawa)
Ojanko High School was released in arcades in Japan but was not released internationally. The game appears to be hard to find.