exhibition sumo tournament; non-major sumo tournament
Refers to a sumo tournament that is not one of the six official honbasho. Often held for charity, regional promotion, or entertainment.
Next month, an exhibition sumo tournament will be held in our hometown.
Unlike official tournaments, at exhibition sumo events you can see the wrestlers in a more relaxed mood.
Compound of 花 (hana, 'flower', here meaning 'showy' or 'for display') and 相撲 (sumō, 'sumo'). The exact origin is uncertain, but it likely refers to sumo performed as a spectacle rather than an official competition.