basket for salt by the ring
In sumo, a small basket placed near the dohyō that holds salt used by wrestlers for purification before a bout.
力士は塩籠から塩を取って土俵にまく。
The wrestler takes salt from the salt basket and scatters it on the ring.
Compound of 塩 (shio, 'salt') and 籠 (kago, 'basket').