Lion Kako is the stage name of Rion Kako, a Japanese voice actor and actor born in Tokyo on September 23, 1980. He is affiliated with the talent management firms Spacenoid Company and Func A ScamperS 009. Kako comes from a family with a strong artistic background; his grandfather was the painter and fashion designer Junichi Nakahara, his grandmother was former Takarazuka Revue star Kuniko Ashihara, and his father is the composer and pianist Takashi Kako.

Kako's career in animation includes a wide range of supporting roles across numerous television series and films. His film credits include a part in the acclaimed 2007 film 5 Centimeters Per Second and the role of Shuji in the 2016 short film Kacchikenee. In television, he has been a recurring presence in long-running franchises. He is known for voicing Tsuneto Tado across multiple installments of the Cardfight!! Vanguard G series, including G, GIRS Crisis, NEXT, Stride Gate-hen, and GZ. He also had a substantial role in the romance anime Bokura ga Ita, providing voices for the character Atsushi across eight episodes as well as various background characters.

His other notable anime credits include a part in the supernatural series Mushi-Shi as Zen, and appearances in major shonen series such as Reborn! (as Saburo Shibaki and other roles) and Yu-Gi-Oh! 5D's (as Andore). He also had a role in the popular comedy OVA Detroit Metal City, voicing several characters including the fictional band member Tetrapot Melon Tea's keyboardist. Kako's profile indicates he has skills in traditional Japanese taiko drumming and street dancing, and his hobbies include film and music appreciation.