Taijima (Japanese: 鯛島) is an uninhabited set of rocky islands off the coast of the Shimokita Peninsula in Mutsu Bay.

Taijima is a set of two islands located about 1 kilometer (0.62 mi) off the coast of the Shimokita Peninsula in Mutsu Bay.

The body island is covered with green, but the tail is stained white from the droppings of seabirds on its steep rocky surface.

A legend holds that a lover of the Heian period shōgun Sakanoue no Tamuramaro was left behind on the island after the conclusion of his campaign to conquer the Emishi.

[1] The island gained protection after the creation of Shimokita Hantō Quasi-National Park on 22 July 1968.