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Surname Tatsumi (Tatsumi , تاتسومي, たつみ) , around the globe, is quite a rare last name. The surname Tatsumi is characteristic of Japan, where it is quite a rare surname, Hong Kong, where it is a rare surname, and Singapore. Measured by absolute frequency, the name is most common in Japan, Indonesia, and China. Likewise, Tatsumi is the forename as well as the last name.