sumo referee who announces the winner and winning technique
A sumo-specific role; the 決まり手係 is the ringside official who declares the match outcome and the kimarite used.
The kimarite-gakari announced 'yorikiri'.
決まり手 means 'winning technique' in sumo; 決まり手係 is the person in charge of announcing it.
Standard kanji spelling for this sumo term.
Alternate spelling with 決り instead of 決まり; less common but attested.
Compound of 決まり手 (kimarite, 'winning technique in sumo') + 係 (gakari, 'person in charge').