During World War II, did Hawaii belong to Japan?

No,

In 1893, American Christian missionaries led all church members to overthrow the Kingdom of Hawaii.

In 1894, the Provisional Government of the Republic of Hawaii was established. The first and last queen of Hawaii was forced to abdicate, and Duheng became the first president of the Provisional Government of the Republic of Hawaii.

In 1898, the United States officially annexed Hawaii.

In the early morning of December 7, 1941 (Hawaii time), Japan used a large number of naval and air forces to raid Pearl Harbor, the main U.S. naval base in the Pacific, causing almost the entire main force of the U.S. Pacific Fleet anchored in the harbor to be annihilated. Known as the "Pearl Harbor Incident" in history.

Pearl Harbor is located at the southern tip of Oahu in the Hawaiian Islands. It forms a cone shape with the ports of Guam and Manila where the US military is stationed, and inserts into the Western Pacific. It is the main obstacle to Japan's southward expansion of the war. In early 1941, Admiral Isoroku Yamamoto, commander-in-chief of the Japanese Combined Fleet, planned an attack on Pearl Harbor to ensure the smooth implementation of the southward war plan.

Before the war, Japan made careful preparations to deceive and paralyze the United States.

Therefore, until the war was imminent, the U.S. military on Hawaii Island was still unprepared for combat.

Around November 18, 1941, the Japanese advance fleet, consisting of 27 submarines of the 6th Fleet and carrying 5 special submarines, set out from Yokosuka and Saeki Bay respectively, divided into 3 routes, and headed Attack Hawaii and take on reconnaissance