Tomokazu Sugita
In April 2012, Ōsaka voiced Yuki Sanada in "Tsuritama". Yukio Nagasaki, who saw his performance at the audition, said he thought that he could become the face of "a new generation of male voice actors in main roles". Nagasaki's support won Ōsaka the role. At the first post-recording, he was nervous and was encouraged by his co-star Tomokazu Sugita, who told him, "We will work, so you can concentrate." He received Best Male Newcomer at the 9th Seiyu Awards in 2015. He also hosts the radio show along with voice actor Natsuki Hanae. Ōsaka announced his marriage to fellow voice actress Manami Numakura on October 23, 2019.