Family name Tsumori (Tsumori 
) , in the world, is a very rare surname. The last name Tsumori is habitual in Brazil, where it is a very rare surname, Canada, where it is an extremely rare surname, and South Africa. In absolute terms, it is commonest in Brazil, the United States, and South Africa. Much more frequently, Tsumori is the forename as well as the last name.
| katsuyoshi tsumori researcher |
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| toshiko tsumori researcher |
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| yūki tsumori Japanese baseball player (b. 1998) |
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