Kauai

Kauaʻi or Kauai (pronounced /ˈkaʊ.aɪ/ in English and [kouˈɐʔi] or [kɐuˈɐʔi] in Hawaiian) is the oldest of the main Hawaiian Islands. With an area of 552.3 square miles (1,430.5 km2), it is the fourth largest of the main islands in the Hawaiian archipelago and the 21st largest island in the United States.Known also as the "Garden Isle", Kauaʻi lies 105 miles (170 kilometers) across the Kauaʻi Channel, northwest of Oʻahu.

Kauai in Days of Infamy
Following and after the Japanese occupation of Hawaii, the Japanese never bother to occupied Kauai as they believe it offer no strategic importance. This deliberate oversight became a backlash for the Japanese occupational forces when American forces secretly built a hidden runway in Kauai which ultimately provided a strategic landing for American B-17 Flying Fortresses and B-24 Liberators that came from the American mainland, provided the bombers aerial bombardment superiority over the Japanese.