Nagoya Grand Sumo Tournament
Refers specifically to the July sumo tournament held in Nagoya, one of the six annual honbasho.
The Nagoya Tournament is held every July at the Aichi Prefectural Gymnasium.
初場所 is held in Tokyo in January, while 名古屋場所 is the July tournament held in Nagoya, so learners should not confuse the location or timing.
Compound of 名古屋 (Nagoya) and 場所 (basho, 'venue' or 'tournament' in sumo context).