部屋へや頭がしら

noun

highest-ranked wrestler in a stable

Sumo term: the top-ranked wrestler within a heya (stable), responsible for discipline and guidance of junior wrestlers.

• 彼かれは部屋へや頭がしらとして、後こう輩はいの指し導どうにあたっている。

  As the highest-ranked wrestler in the stable, he is responsible for coaching the junior wrestlers.