Eiji Mitooka (水戸岡 鋭治, Mitooka Eiji, born 5 July 1947 in Okayama Prefecture) is a Japanese industrial designer, illustrator, and managing director of the industrial design company Don Design Associates (ドーンデザイン研究所).

[1] Mitooka graduated from Okayama Technical High School in 1965.

[1] After graduating from high school, Mitooka worked at Studio Silvo Coppola in Italy before founding Don Design Associates in 1972.

[1] The company oversees design projects for buildings, interiors, railway vehicles, graphics, and products.

[1] In October 2011, Mitooka was awarded the 59th Kikuchi Kan Prize, presented annually by Bungei Shunju literary magazine and the Society for the Advancement of Japanese Culture.