noun
Shinto ritual sumo; sumo for harvest festivals
Sumo performed as a sacred offering at Shinto shrines, especially during autumn harvest celebrations.
秋になると、各地の神社で神事相撲が奉納される。
In autumn, Shinto ritual sumo is dedicated at shrines across the country.
奉納相撲 is a broader term for sumo dedicated to deities, while 神事相撲 specifically refers to sumo as part of Shinto harvest rites.
Compound of 神事 (Shinto ritual) and 相撲 (sumo). The exact historical origin is uncertain, but the practice is deeply rooted in agrarian Shinto traditions.