Last name Hamanaka (ハマナカ 
, Hamanaka 
) , across the world, is a rare cognomen. The surname Hamanaka is characteristic of Hong Kong, where it is a rare surname, Singapore, and Norway, where it is a very rare surname. Not in comparison with a country's population, it is commonest in the United States, Indonesia, and Brazil. More prevalently, Hamanaka is the forename as well as the last name.
| VARIANT | COUNTRY |
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| ハマナカ | Japan |
| Hamanaka | United States, Brazil, Japan, Indonesia, Hong Kong |
| ohgen hamanaka (b. 1945) |
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| miki hamanaka Lithuanian ballet dancer, LT (b. 1978) |
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| haru hamanaka (b. 1969) |
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| sheila hamanaka American writer and artist, US |
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| kunio hamanaka researcher |
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| kazutoshi hamanaka researcher (ORCID 0000-0002-4640-5690) |
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| marcos hamanaka researcher |
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| kohei hamanaka researcher |
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| miki hamanaka researcher |
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| gen hamanaka researcher |
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| robert b hamanaka researcher (ORCID 0000-0002-8909-356X) |
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| mayumi hamanaka visual artist, JP |
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| klára hamanaka (b. 1980) |
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| ayae hamanaka (b. 1982) |
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