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Around the world, Kaisen (开森 , 凯森 , Kaisen ) is quite a rare masculine given name. The forename Kaisen is characteristic of Azerbaijan, where it is quite a rare boy's name, China, where it is a rare male name, and Kazakhstan. In absolute terms, it is the most numerous in China, Azerbaijan, and India. Very seldom, Kaisen is the last name as well as the forename.