is a Japanese voice actor and narrator.
After attending Tokyo Announce Gakuin Performing Arts College and Mausu Promotion Actor Training Center, he joined Mausu Promotion. He is currently a freelancer.
Among his many roles, he voiced Shichika Yasuri in Katanagatari, Kuranosuke Shiraishi in The Prince of Tennis, Reiner Braun in Attack on Titan, Kojou Akatsuki in Strike the Blood, IV in Yu-Gi-Oh! Zexal, Saburà  Katà  in ', Junpei Hyà «ga in Kuroko's Basketball, Sentarà  Kawabuchi in Kids on the Slope, Haruhiro in Grimgar of Fantasy and Ash, Daryun in The Heroic Legend of Arslan, Orga Itsuka in ', Akari Hizamaru in Terra Formars, Doppo Kunikida in Bungo Stray Dogs, Asahi Azumane in Haikyu!!, Fumikage Tokoyami in My Hero Academia, Nagare Akiba in Ushio and Tora, John H. Watson in The Empire of Corpses, Aren Kuboyasu in The Disastrous Life of Saiki K., Genjirà  Tanigaki in Golden Kamuy, Joe in Megalobox, Houjou Shà «saku in In This Corner of the World, Ausukai Jin in Boogiepop and Others, Kanata Hoshijima in Astra Lost in Space, Shin in Dorohedoro, Belial in Granblue Fantasy, Welt Yang in Honkai Impact 3rd and ', and Watanabe in '.
Hosoya won awards at the 8th Seiyu Awards and 10th Seiyu Awards for best supporting actor. On April 23, 2017, he underwent treatment for his throat. He resumed his career on August 4, 2017.
On 10 March 2025, Hosoya announced on Twitter that he had married someone outside the entertainment industry.