OSAKA — Japan was upbeat Friday as its national team beat Tunisia in a make-or-break match in Osaka to secure a place in the second round of the World Cup soccer finals.

Nagai Stadium and the downtown area were awash with jubilant, cheering fans, about 500 of whom illustrated their joy by jumping into the Dotonbori River from Ebisubashi Bridge and other vantage points, police said.

Two who jumped in naked were later arrested by police for exposing themselves in public, while four others were apprehended after a fight with police officers.