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In all the world, Mitsumasa (Mitsumasa , יונאי ) is a rare masculine first name. The forename Mitsumasa is habitual in Eastern Asia, particularly Japan, where it is a very rare male name, and China, where it is an extremely rare masculine name. More frequently, Mitsumasa is the last name as well as the forename.
Mitsumasa is also a name for the fictitious and mythical characters: Mitsumasa Kido , the fictional character from Saint Seiya.