The Japanese spider crab is found in the Pacific side of the Japanese islands, Konshu and Kyushu, usually at a latitude between 30 and 40 degrees North. They are found usually in the Sagami, Suruga, and Tosa bays, as well as off the coast of the Kii peninsula. However, a Japanese spider crab was once found as far south as Su-ao, in eastern Taiwan. This is most likely a one time event; it is possible a fishing trawler or extreme weather may have carried this individual much further south than its home range. The Japanese spider crab is found up to the depths of 2,500 feet (750 meters). 