- Born: 1543
- Died: 1580
- Sons: Utsunomiya Kunitsuna, Utsunomiya Yorikatsu, Haga Takasada
- Distinction: Shimotsuke warlord
Hirotsuna was the son of Utsunomiya Naotsuna. Owing to strife within Shimotsuke following the death of Naotsuna, Hirotsuna was forced to flee to the Satake domain as a child. He was married to a daughter of Satake Yoshiaki and with Yoshiaki's assistance was able to recover the Utsunomiya domain, which had been lost earlier to Nasu Takasada. He was succeeded by his son Kunitsuna.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005