Globally, Hirotsugu (Hirotsugu 
) is a rare boy's forename. The first name Hirotsugu is characteristic of Eastern Asia, particularly Japan, where it is a very rare boy's name, and China, where it is an extremely rare male name. Likewise, Hirotsugu is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Hirotsugu | Brazil, Japan, Vietnam, United States, China |
| kawakatsu hirotsugu (b. 1744) |
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| hirotsugu inanami Japanese equestrian (b. 1908) |
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| hirotsugu ueno Japanese candidate (b. 1977) |
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| hirotsugu okamoto researcher |
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| hirotsugu imaeda researcher (ORCID 0000-0002-5516-8527) |
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| hirotsugu fujii Japanese particle physicist |
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| hirotsugu aiga researcher (ORCID 0000-0001-5910-3379) |
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| hirotsugu mitsuhashi researcher |
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| hirotsugu kanda researcher |
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| hirotsugu hamamoto researcher |
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| hirotsugu imaeda researcher ORCID ID=0000-0003-1552-7799 |
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| hirotsugu ogi researcher |
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| hirotsugu noguchi researcher (ORCID 0000-0003-3738-9219) |
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| hirotsugu nakai researcher (ORCID 0000-0002-2080-5901) |
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| hirotsugu uemura researcher (ORCID 0000-0002-3665-9523) |
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