Eizou Tsuda is a Japanese actor and voice actor born on March 17, 1948, in Saitama Prefecture, Japan. He is affiliated with the Tokyo Actor's Consumer's Cooperative Society, often shortened to Haikyo. Tsuda began his career in theater, joining the Toen Theatre group in 1971, before transitioning into voice acting and founding his own theatrical planning and production company, Native Planning, in 2001. He is known for his baritone voice, which he has lent to a wide array of authoritative and paternal figures across anime, video games, and dubbed foreign media. Beyond acting, his talents include playing the guitar.

Tsuda's voice acting career spans several decades, with his debut in animation occurring in 1979 with a role in the television anime The Ultraman. He has built a substantial filmography, taking on significant roles in major franchises. He is well-known for voicing paternal characters such as Hiashi Hyuga in the long-running Naruto and Boruto: Naruto Next Generations series. He also voiced the character Frange in the science fiction series Gargantia on the Verdurous Planet. His work in the 2010s included roles in Golden Kamuy as Kenzo Tamoto and in Vivy -Fluorite Eye's Song-.

Among his notable roles are the ones specified by the user. In the 2019 fantasy anime Fairy Gone, Tsuda provided the voice for Lay Dawn, a character central to the backstory of one of the main protagonists. He voiced the foundational but pivotal character Zeon Zum Deikun in the Mobile Suit Gundam: The Origin OVA series and its television edit, Advent of the Red Comet. In the same year, he took on the role of the seasoned and mysterious agent Karabo Frampton in Lord El-Melloi II's Case Files: Rail Zeppelin Grace note. Another 2019 role was Hyōei in the science fiction anime special Black Fox.

Throughout his career, Tsuda has demonstrated versatility, taking on roles that range from wise leaders to formidable antagonists. He has also been active as a narrator for documentaries and has voiced characters in numerous foreign films and television series for the Japanese market. His long-standing presence in the industry and his consistent performances have made him a respected figure among colleagues and fans.