Last name Hirotsuka (Hirotsuka 
) , worldwide, is a rare surname. The last name Hirotsuka is habitual in Japan, where it is a rare surname, the United States, where it is an extremely rare surname, and Canada. Measured by absolute frequency, it is commonest in Japan, the United States, and Brazil. Much less frequently, Hirotsuka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hirotsuka | United States, Canada, Japan, Brazil |