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Cognomen Shigaki (志垣 , Shigaki ) , throughout the world, is a rare last name. The family name Shigaki is characteristic of Brazil, where it is a rare surname, Japan, where it is a very rare surname, and the United States. Measured by absolute frequency, this name is the most popular in Brazil, China, and the United States. Likewise, Shigaki is the forename as well as the last name.