<P> One further consequence of the attack on Pearl Harbor and its aftermath (notably the Niihau incident) was that Japanese American residents and citizens were relocated to nearby Japanese - American internment camps . Within hours of the attack, hundreds of Japanese American leaders were rounded up and brought to high - security camps such as Sand Island at the mouth of Honolulu harbor and Kilauea Military Camp on the island of Hawaii . Eventually, more than 110,000 Japanese Americans, nearly all who lived on the West Coast, were forced into interior camps, but in Hawaii, where the 150,000 - plus Japanese Americans composed over one - third of the population, only 1,200 to 1,800 were interned . </P> <P> The attack also had international consequences . The Canadian province of British Columbia, bordering the Pacific Ocean, had long had a large population of Japanese immigrants and their Japanese Canadian descendants . Pre-war tensions were exacerbated by the Pearl Harbor attack, leading to a reaction from the Government of Canada . On February 24, 1942, Order - in - Council P.C. no . 1486 was passed under the War Measures Act allowing for the forced removal of any and all Canadians of Japanese descent from British Columbia, as well as the prohibiting them from returning to the province . On 4 March, regulations under the Act were adopted to evacuate Japanese - Canadians . As a result, 12,000 were interned in interior camps, 2,000 were sent to road camps and another 2,000 were forced to work in the prairies at sugar beet farms . </P> <P> The Japanese planners had determined that some means was required for rescuing fliers whose aircraft were too badly damaged to return to the carriers . The island of Niihau, only 30 minutes flying time from Pearl Harbor, was designated as the rescue point . </P> <P> The Zero flown by Petty Officer Shigenori Nishikaichi of Hiryu was damaged in the attack on Wheeler, so he flew to the rescue point on Niihau . The aircraft was further damaged on landing . Nishikaichi was helped from the wreckage by one of the native Hawaiians, who, aware of the tension between the United States and Japan, took the pilot's maps and other documents . The island's residents had no telephones or radio and were completely unaware of the attack on Pearl Harbor . Nishikaichi enlisted the support of three Japanese - American residents in an attempt to recover the documents . During the ensuing struggles, Nishikaichi was killed and a Hawaiian civilian was wounded; one collaborator committed suicide, and his wife and the third collaborator were sent to prison . </P>

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