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Last name Kuroyanagi (Kuroyanagi ) , all over the world, is a rare surname. The family name Kuroyanagi is habitual in Bermuda, where it is quite a rare surname, Singapore, where it is a very rare surname, and Japan. Not in comparison with a country's population, it is the most numerous in Japan, Brazil, and Poland. Likewise, Kuroyanagi is the forename as well as the last name.