State of Formosa (Japanese: フォルモサ国, Forumosa-koku), officially The Empire of Japan (Japanese: 大日本帝國, Dai Nippon Teikoku or Dai Nihon Teikoku), but commonly referred to simply as Formosa, is a isolationist state that emerged in the aftermath of Japan’s surrender in World War II. Established in the autumn of 1945 by remnants of the Imperial Japanese government, military command, and civilian loyalists who rejected the legitimacy of surrender, Formosa proclaimed itself the spiritual, legal, and political continuation of the prewar empire, a claim it maintains to the present day.

Governed by a rigid theocratic system (Way of Living Bloom) rooted in imperial symbolism and state shinto, Formosa rejects the postwar international order. As a result, it remains deeply inward-looking, with very limited external contact, strict control on information, and culture defined by myth and tradition.

The state de-facto controls the island of Formosa, Sakishima Islands and Senkaku Islands, while de-jure it claims the former territories of the Japanese Empire.