Family name Kumasaka (Kumasaka 
) , throughout the world, is a rare surname. The surname Kumasaka is habitual in Brazil, where it is a very rare surname, the United States, and Canada, where it is an extremely rare surname. In absolute terms, it is commonest in Brazil, the United States, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Kumasaka | Brazil, France, United States, United Kingdom, Germany |
|
guilherme kumasaka badminton player, BR (b. 1978) |
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| soma kumasaka researcher ORCID ID = 0000-0001-5541-3847 |
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| toshio kumasaka researcher |
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| fernanda kumasaka badminton player, BR (b. 1981) |
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| nobuhiro kumasaka |
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| hitomi kumasaka |
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| takashi kumasaka researcher |
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