OSAKA—As Osaka prepares to host the 2025 Osaka Kansai Expo, local authorities and businesses are stepping up efforts to attract foreign tourists and tap into the city’s vibrant nightlife.

OSAKA -- An aerial view of the venue on Yumeshima, a man-made island in Osaka Bay, shows pavilions of Expo 2025 in Osaka, Kansai, standing inside and outside the Grand Ring, a large wooden ...