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Last name 本川 (本川 , Motokawa , Benchuan ) , worldwide, is quite a rare family name. The last name 本川 is habitual in Japan, where it is quite a rare surname, Malaysia, where it is a very rare surname, and Canada. In absolute terms, it is commonest in Japan, China, and the United States. Also, 本川 is the forename as well as the last name.