Kaiyukan in Osaka's Minato Ward holds an event every year around this time where a diver dressed as a demon appears in an aquarium. Two divers who normally clean the tank appeared dressed as red demon and a blue demon in a huge aquarium filled with approximately 1,500 fish.
A 10-year-old boy who came from Hyogo Prefecture with his family said, ''It was fun. I want to keep the photo I took with the demon diver as a souvenir.''