| Ryuzan Aki | |
| Native Name: | 秋竜山 |
| Native Name Lang: | ja |
| Birth Name: | Yoshifumi Aki |
| Birth Place: | Itō, Shizuoka Prefecture, Empire of Japan |
| Death Place: | Sagamihara, Kanagawa Prefecture, Japan |
| Other Names: | Ryuzan Akiyama |
| Occupation: | Mangaka |
Yoshifumi Aki (13 March 1942 – 6 March 2023), best known under the pen name Ryuzan Aki, was a Japanese manga artist and writer.
Born in Itō, Shizuoka into a family of fishermen, Aki worked as fisherman and later as a post office clerk while collaborating part-time as a manga artist with various publications.[1] He decided to become a full-time professional manga artist after one of his works was published on Weekly Manga Times, and in 1966 he left the post office and moved to Tokyo to devote himself fully to his profession.[2]
Specialized in nonsense gag cartoons, during his career Aki received numerous awards, notably two Shogakukan Manga Awards, in 1971 for his series Gag Ojisan and Oya Baka Tengoku and in 1975 for Oh☆Jarry's!, and the Japan Cartoonists Association Award Grand Prize in 2006 for Akiryuuzan Tsushin. He also received a lifetime Minister of Education, Culture, Sports, Science and Technology Award for his career. Diagnosed with pneumonia, he died of heart attack on 6 March 2023, at the age of 80.[3]