Outside of the Free! series, Tsuda has voiced popular characters in a variety of anime, drama CDs and games. Unlike most of his fellow Free! seiyuu, he takes on roles that involve less singing, but has still performed character songs with them.
Across the various series this includes, but is not limited to:
In 2020, Kenjiro revealed that he had married some time ago and had two children. In order to protect his family and maintain his appeal to fans, he initially chose not to share this; however, in 2020, a gossip magazine shared a story about his marriage without his consent. This prompted him to write an official post on Instagram to reveal the truth from himself rather than a disreputable secondary source.