[1] He is known for his roles in Cowboy Bebop (as Spike Spiegel), the Yakuza videogame series (as Shun Akiyama), Shōwa Genroku Rakugo Shinjū (as Sukeroku), Ghost in the Shell (as Togusa), Neon Genesis Evangelion (as Ryoji Kaji), Gintama (as Shoyo Yoshida / Utsuro), Ninja Scroll (as Jūbei Kibagami), Dragon Ball Super (as Beerus), Anpanman (as Cheese), Ranma ½ (as Ryōga Hibiki/P-chan and the Jusenkyō Guide), Space Battleship Yamato 2199 (as Aberdt Desler), Pretty Cure All Stars DX 3 (as Black Hole) and Lupin III (as the official voice of Koichi Zenigata since 2011).
Fox, Will Ferrell, Chris Pratt and Jon Hamm in the Japanese language releases of their respective films.
In October 1997, Yamadera became a host on the TV Tokyo children's variety show Oha Suta.
[11] In a 2012 article by Japan Times, it was mentioned that he didn't consider doing voice acting at first, and was interested in going into sales or being an onscreen actor.
[12] Yamadera's also known for his versatile range, as shown in the video game Danganronpa V3: Killing Harmony where he voiced all five Monokuma Kubs, including Monophanie (female).
[13] In 2011 and 2017, TV Asahi conducted a poll among Japanese voice actors and actresses on "who they thought was really the most amazing person in their profession".
[17] According to the series showrunner Gray Haddock, "Yamadera-san gives Kazu a fantastic balance of attitude and strength, and as anime fans we're doing our best not to geek out that he's joined the cast".
[21] On June 14, 2021, at age 60, he announced his marriage to radio personality Robin Shoko Okada, who is 31 years younger than him.