Eiji Maruyama was a Japanese voice actor and actor from Tokyo, active in the industry from the 1950s until his passing in 2015. He was born on October 23, 1930, and died on September 24, 2015, at the age of 84. His real name was Yutaka Ogawa. For a significant part of his career, he was represented by the talent agency Arts Vision.

Maruyama's career was notable for its extensive range across different media. He was a stage actor and also appeared in television dramas, including NHK's Taiga dramas, before focusing more on voice work. In the world of voice acting, he was particularly well-known for his long-standing and prolific participation in tokusatsu (special effects) television series. He was proud of being one of the few voice actors to have lent his voice to all four major Japanese tokusatsu franchises: Ultraman, Kamen Rider, Super Sentai, and the Metal Hero Series. In these shows, he frequently voiced various monsters and villains. Some of his tokusatsu roles included the Alien Wild in Ultraseven, the Alien Temperor in Ultraman Taro, and various monster voices in series like Himitsu Sentai Gorenger and J.A.K.Q. Dengekitai.

In anime, Maruyama built a career playing a wide array of characters, often lending his voice to older, wise, or villainous figures. He took on many roles throughout his long career, providing voices for numerous series. Some of his notable anime roles include Wiseman in Sailor Moon R, Souken Ishida in Bleach, the老教师 (old teacher) in Neon Genesis Evangelion, and Garnet Hog in Scrapped Princess. He also voiced Jackson Weir in After War Gundam X and镇元子 (Zhen Yuanzi) in Gensomaden Saiyuki.

A recurring pattern in Maruyama's career was his versatility and ability to portray characters with gravitas, whether they were mentors, elders, or antagonists. His filmography demonstrates a consistent collaboration with the major animation and production studios in Japan over several decades. His final voice roles were in anime series broadcast in 2013 and 2014, such as The Eccentric Family and神さまのいない日曜日 (Sunday Without God).