Five professional wrestlers put on a show in a two-car train in northern Japan on Saturday.
Passengers cheered as the wrestlers ran around the train, jumping from seats to take down their opponents.
Eighteen sumo wrestlers at the Tamanoi stable in Tokyo have been confirmed to have the coronavirus.
The Japan Sumo Association says 32 wrestlers were tested after a rank-and-filer at the sumo stable was confirmed to be infected on Saturday. Eighteen of them tested positive, including a Juryo division wrestler, Fujiazuma.
The Japan Sumo Association says a stable master and five wrestlers have tested positive for the coronavirus.
Stable master Takadagawa, whose ring name was Akinoshima, underwent a test on Thursday after developing a fever. His test result came back positive on Friday.