Marumari

Marumari (丸円) is a veteran team of Marble racers, consisted exclusively of members of the Ishimaru family, a generational lineage of Marble racers since Japan's Meiji period, although the team was formally introduced in 2017.

A lot of their members are usually selected to represent Japan for Marble Championship and Marble Prix.

Tracks
Alongside the Grue Dragons and Heroic Spheres, Marumari also hosts and designs tracks for nation-based tournaments.