Originally having only the three children friends Shiromi Kosegawa, Kurumi Kakura, and Sae Usuzawa as members, the mahjong club grew when Toshi decided to bring Toyone Anetai into the club and Aislinn Wishart decided to join after watching the team play. Miyamori is one of the few schools who proceed to the second round of the 71st Inter High, knocking off high ranking Makabi High.
ClubMiyamori is coached by Toshi Kumakura.
- Girls' team tournament
- Shiromi Kosegawa (vanguard)
- Aislinn Wishart (sergeant)
- Kurumi Kakura (lieutenant)
- Sae Usuzawa (vice-captain)
- Toyone Anetai (captain)
71st Inter High
- Main article: 71st Inter High School Mahjong Championships
- Miyamori is the second school to have a regular team of students completely in the same year, the first being Ryuumonbuchi.
- However, Miyamori is the only school that has had a team of only 3rd years so far.