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Surname Kiriyama (桐山 , Kiriyama , きりやま) , across the world, is a rare last name. The surname Kiriyama is characteristic of Singapore, where it is a rare surname, Japan, where it is a very rare surname, and New Zealand. Measured by absolute frequency, it is commonest in China, Japan, and Indonesia. Likewise, Kiriyama is the forename as well as the last name.