In anticipation of the Hanshin Tigers' victory, the city is overseeing the regulation of water levels in the Dotonbori River, a popular celebratory spot among fans. This measure is taken to ensure public safety while letting the revelries proceed. It's a preemptive action set in Osaka, where the celebrated Hanshin Koshien Stadium is located.

When the Hanshin Tigers win, fans typically jump into the Dotonbori River in celebration, a tradition known as 'naniwa no yūshō tobi'. Regulation of the river's water level by the city is a way to protect fans from harm during these celebrations, reflecting Japan's societal value for safety and order even amidst festivities.

In the US or EU, such fan behaviors may be controlled more through law enforcement and regulations against public disturbances rather than environmental modifications. However, team victory celebrations can still become quite rowdy, and pose similar safety concerns as they do in Japan.