[Snickering Hound]

Japan did not have the shipping to carry troops and supplies to invade Hawaii. Indeed Japan started the war with a shortage of shipping.

Oahu had the 24th and 25 infantry divisions plus the 34th engineer regiment, all full strength regular army formations in Dec 41'

There was no stronger American army garrison anywhere.

[GreenLanternCorps]

Very true, and the Japanese never executed an opposed landing against a well defended beach during the entire war.