In the world, Naohiro (Naohiro 
, Наохиро 
) is a rare male forename. The forename Naohiro is habitual in Japan, where it is a rare masculine name, the United States, where it is an extremely rare principally masculine, but very infrequently feminine name, and China, where it is an extremely rare male name. Much less frequently, Naohiro is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Naohiro | China, Brazil, United States, Malaysia, Japan |
| Наохиро | Russia |
| nabeshima naohiro (b. 1618) |
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| matsudaira naohiro [松平直泰] daimyo of the middle Edo period; 4th lord of Akashi (b. 1749) |
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andō naohiro (b. 1821) |
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| matsudaira naohiro [松平直寛] daimyo of the late Edo period; 8th lord of Hirose (b. 1783) |
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| mizoguchi naohiro Japanese daimyō (b. 1819) |
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naohiro ogawa Population economist from Japan, JP (b. 1944) |
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| naohiro watanabe (b. 1915) |
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| naohiro naruhashi botanist (b. 1941) |
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| naohiro fujita (b. 1948) |
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| naohiro sekiguchi researcher |
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| naohiro kurotaki researcher |
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| naohiro tsuyama researcher |
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| naohiro makise researcher |
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| naohiro aida researcher |
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| naohiro uezono researcher |
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