Loliolus Japonica, the Japanese squid, is a species of squid from the family Loliginidae. As the name suggests, it lives around Japan, but has also been found around Vietnam and China. They are pelagic, living 1–30 m (3 ft 3 in – 98 ft 5 in) down in the ocean.

The Japanese squid has light tan skin, with speckles all over its mantle and tentacles. It has a particularly large mantle, and an unusually wide fin along the mantle as well. It has dark, black eyes. Females are larger than males. The maximum length a male can get is 12 centimeters. Loliolus japonica are nonbioluminescent species which means that they do not emit light. A male will perform various rituals to get a female's attention, and after that they will mate.