noun
sumo stablemaster association
In sumo, a group or meeting of stablemasters (oyakata) who belong to the same ichimon (clan).
一門会で次の場所の番付について話し合われた。
At the stablemasters' association meeting, they discussed the rankings for the next tournament.
noun
fan club; followers' association
Used in traditional performing arts like rakugo, where followers of a famous performer form an association.
その落語家の一門会が主催する寄席が毎月開かれる。
A variety show hosted by that rakugo performer's followers' association is held every month.