Dotonbori Riverside Grill Wonder is an outdoor bar on the Dotonbori riverside in Osaka that serves drinks and snacks such as takoyaki. It operates as outdoor seating where guests drink beer while looking at the riverside night view. Hours are from 18:00 to 24:00, and music and dancing continue long enough for the golden bell to ring more than ten times. Heaters are placed at the outdoor seats in winter so guests can sit warm.