referee for makuuchi division bouts
In sumo, a referee rank that officiates matches of rank-and-file wrestlers in the top division (makuuchi).
A referee of makuuchi rank stepped onto the ring.
After many years of experience, he was promoted to the rank of makuuchi referee.
幕内 is the top division of sumo wrestlers; 幕内格 is the referee rank corresponding to that division.
Compound of 幕内 (makuuchi, the top sumo division) and 格 (kaku, rank/status). The term refers to the referee rank for that division.