The Niʻihau incident (or Battle of Niʻihau) occurred on December 7, 1941, when Imperial Japanese Navy Air Service pilot Shigenori Nishikaichi (西開地 重徳 Nishikaichi Shigenori) crash-landed his Zero on the Hawaiian island of Niʻihau after participating in the attack on Pearl Harbor. He was killed in a struggle with people on the island.
The island's Native Hawaiian residents were initially unaware of the attack, but apprehended Nishikaichi when the gravity of the situation became apparent. Nishikaichi then sought and received the assistance of three locals of Japanese descent in overcoming his captors, finding weapons, and taking several hostages. Eventually, Nishikaichi was killed by Niihauans Benehakaka "Ben" Kanahele and Kealoha "Ella" Kanahele; Ben Kanahele was wounded in the process, and one of Nishikaichi's confederates, Yoshio Harada, committed suicide.
The incident and the actions of Nishikaichi's abettors demonstrated the potential for racial or ethnic allegiance to overwhelm national allegiance; this ultimately may have influenced the decision to intern Japanese Americans during World War II. Ben Kanahele was decorated for his part in stopping the incident; Ella Kanahele received no official recognition.
Niʻihau or Niihau (/ˈniːhaʊ/; Hawaiian: [ˈniʔiˈhɐw]) is the westernmost and seventh largest of the inhabited Hawaiian Islands in the U.S. state of Hawaiʻi, lying 17.5 miles (15.2 nmi; 28.2 km) southwest of Kauaʻi across the Kaulakahi Channel and having an area of 69.5 square miles (180 km2). Several intermittent playa lakes provide wetland habitats for the Hawaiian coot, the black-winged stilt, and the Hawaiian duck. The island is designated as critical habitat for Brighamia insignis, an endemic and endangered species of Hawaiian lobelioid. The United States Census Bureau defines Niʻihau and the neighboring island and State Seabird Sanctuary of Lehua as Census Tract 410 of Kauai County, Hawaii. Its 2000 census population was 160; Its 2010 census population was 170.
Elizabeth Sinclair purchased Niʻihau in 1864 from the Kingdom of Hawaii and private ownership passed on to her descendants, the Robinson family. During World War II, the island was the site of the Niʻihau Incident: A Japanese navy fighter pilot crashed on the island and terrorized its residents for a week after the attack on Pearl Harbor. The people of Niʻihau are known for their gemlike lei pūpū (shell lei) craftsmanship, and speak Hawaiian as a primary language. The island is generally off-limits to all but relatives of the island's owners, U.S. Navy personnel, government officials and invited guests, giving it the nickname "The Forbidden Isle." Beginning in 1987, a limited number of supervised activity tours and hunting safaris have opened to tourists. The island is currently managed by Bruce and Keith Robinson.