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Surname Ikenaga (Ikenaga , 池永 ) , around the world, is a rare last name. The family name Ikenaga is habitual in Belgium, where it is a rare surname, Brazil, where it is a very rare surname, and Japan. Measured by absolute frequency, this name is the most popular in Brazil, Japan, and the United States. Very seldom, Ikenaga is the forename as well as the last name.