Across the world, Naohiko (Naohiko 
) is a rare male forename. The given name Naohiko is habitual in Eastern Asia, particularly Japan, where it is a very rare masculine name, and China, where it is an extremely rare boy's name. Also, Naohiko is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Naohiko | Japan, China, Singapore, United States, Brazil |
| naohiko ito (b. 1940) |
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| naohiko ishida Japanese sledge hockey player, JP (b. 1967) |
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| naohiko oikawa (b. 1965) |
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| naohiko ueno (b. 1965) |
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| naohiko anzai researcher |
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| naohiko masaki researcher (ORCID 0000-0002-0631-8648) |
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| naohiko aozasa researcher |
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| naohiko ohama researcher |
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| naohiko hoshino D.Sc. Kyoto University 2011 |
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| naohiko ueno researcher ORCID ID = 0000-0003-2946-1524 |
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| naohiko shimada researcher |
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| naohiko inaba researcher |
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| naohiko nakanishi researcher |
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| naohiko ikuma researcher |
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| naohiko okabe researcher |
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