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Family name Hosaka (ホサカ , Hosaka ) , all around the world, is a rare cognomen. The surname Hosaka is habitual in Cayman Islands, where it is quite a rare surname, Japan, where it is a rare surname, and New Zealand. Not in comparison with a country's population, this name is the most popular in the United States, Japan, and Brazil. More frequently, Hosaka is the forename as well as the last name.