Yoshimasa Hosoya is a Japanese voice actor and singer from Hiroshima. He was represented by Mausu Promotion and is now a freelancer. He was also a member of the pop duo MaxBoys along with Toshiki Masuda, a fellow Japanese voice actor. In 2014 & 2016, he won the 8th Seiyu Awards & 10th Seiyu Awards for Best supporting actor.

Among his many roles in anime, he voiced Kojou Akatsuki in Strike the Blood, Reiner Braun in Attack on Titan, Fumikage Tokoyami in My Hero Academia, Tamaki Katagiri in Black Bullet, Shichika Yasuri in Katanagatari, Daryun in The Heroic Legend of Arslan, Belial in Granblue Fantasy, and Orga Itsuka in Mobile Suit Gundam: Iron-Blooded Orphans. He also appears in many sports anime as Junpei Hyuga in Kuroko's Basketball, Sosuke Yamazaki in Free! Eternal Summer, Asahi Azumane in Haikyuu!!, Tetsuya Yuki in Ace of Diamond and Otabek Altin in Yuri!!! on Ice.

On April 23, 2017, he announced a hiatus to undergo treatment for his throat. On August 4, 2017, he announced his return to voice work.