Banzuke

okamisan

The stablemaster's wife, who runs much of stable life.

The okamisan is the stablemaster's wife, and she's treated as the mother of the stable. She advises the young wrestlers and handles much of the stable's business.

oyakata
A stablemaster or coach, almost always an elder of the association.
heya
A stable: the house where wrestlers train, and where the juniors live.

Sources

More stable life · The whole glossary