Why did Japan not immediately invade Hawaii after the attack on Pearl Harbor?
Short answerJapan lacked the assault and supply force, faced surviving Hawaiian defenses, and could not locate the US carriers, making occupation far beyond the raid's already considerable risk.
NotesThe Japanese strike force did not know where the American carriers were and could not assume freedom from counterattack. Hawaii still possessed aircraft, submarines, coastal defenses, troops, and a functioning logistical base. Japan had not brought the landing force, transports, supplies, and sustained naval cover needed to conquer and hold the islands. The raid was a high-risk effort to disable the Pacific Fleet, while an invasion would be a much larger campaign with no reliable path to reinforcement.