Japanese settlement in the Marshall Islands Japanese settlement in the Marshall Islands Japanese settlement in the Marshall Islands was spurred on by Japanese trade in the Pacific region. The first Japanese explorers arrived in the Marshall Islands in the late 19th century, although permanent settlements were not established until the 1920s. As compared to other Micronesian islands in the South Pacific Mandate, there were fewer Japanese who settled in the islands. After the Japanese surrender in 1945, the Japanese populace were repatriated to Japan, although people of mixed Japanese–Marshallese heritage remained behind. They form a sizeable minority in the Marshall Islands' populace, and are well represented
History of the Marshall Islands kilotons, over 7,200 times more powerful than the atomic weapons used during World War II." With the 1952 test of the first U.S. hydrogen bomb, code named "Ivy Mike," the island of Elugelab in the Enewetak atoll was destroyed. In 1956, the United States Atomic Energy Commission regarded the Marshall Islands as "by far the most contaminated place in the world." Nuclear claims between the U.S. and the Marshall Islands are ongoing, and health effects from these nuclear tests linger. Project 4.1 was a medical study conducted by the United States of those residents of the Bikini Atoll exposed to