Surname Hirotsugu (Hirotsugu 
) , globally, is a rare family name. The last name Hirotsugu is characteristic of Singapore, where it is a rare surname, Japan, and Vietnam, where it is a very rare surname. In absolute terms, it is the most numerous in Japan, China, and Vietnam. Also, Hirotsugu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hirotsugu | Vietnam, Brazil, United States, Japan, China |