The Japanese spider crab (高脚蟹, takaashigani?, lit. "tall-footed crab"), Macrocheira kaempferi, is a species of marine crab that lives in the waters around Japan. It has the largest leg span of any arthropod, reaching up to 3.8 metres (12 ft) and weighing up to 41 pounds (19 kg). It is the subject of small-scale fishery.
The Osaka Aquarium Kaiyukan (海遊館, Kaiyūkan?, known as the Kaiyukan) is an aquarium located in the ward of Minato in Osaka, Japan, near Osaka Bay. It is one of the largest public aquariums in the world, and is a member of the Japanese Association of Zoos and Aquariums (JAZA).
The aquarium is about a five-minute walk from Osakako Station on the Osaka Municipal Subway Chūō Line, and is next to the Tempozan Ferris Wheel.