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Last name Shimono (シモノ , Shimono , 下野 ) , globally, is a rare surname. The cognomen Shimono is characteristic of Estonia, where it is a rare surname, Japan, where it is a very rare surname, and the United States. Measured by absolute frequency, the name is most common in the United States, Brazil, and Japan. More prevalently, Shimono is the forename as well as the last name.