noun
referee officiating the lowest division
In sumo, a referee (gyōji) of the lowest rank, officiating matches in the jonokuchi division.
序ノ口格の行司が土俵に上がった。
A referee of the lowest rank stepped onto the ring.
Compound of 序ノ口 (jonokuchi, the lowest sumo division) and 格 (kaku, rank/status).