sacred items buried in the sumo ring
Sumo term: objects such as rice, salt, or other purifying items buried in the dohyō during its ritual purification ceremony.
During the dohyō-iri purification ceremony, items such as rice and salt are buried in the center of the ring as shizumemono.
Compound of 鎮め (shizume, 'calming, appeasing') + 物 (mono, 'thing'). The exact historical origin is uncertain, but the term is specific to sumo ritual.