"A Karate-Crazy Life") is a Japanese manga drawn by Jirō Tsunoda and Jōya Kagemaru, with the story written by Ikki Kajiwara.

The story was inspired by the life of the real-life karate martial artist Mas Oyama.

The anime television series was produced by Tokyo Movie and aired Wednesdays, from 19:30 to 20:00, on NET from October 3, 1973 to September 25, 1974, totaling 47 episodes.

[5] The two-part film, Shin Karate Baka Ichidai: Kakutōsha, which was directed by Takeshi Miyasaka and released in 2003 and 2004 to commemorate the seventeenth anniversary of Kajiwara's death, is often treated as an adaptation of the manga,[5] but its direct source is a book by Hisao Maki, Kajiwara's younger brother.

[7] The success of the manga and the anime are often credited for producing a "karate boom" in Japan in the early 1970s.