Jun Sadogawa was the pen name of Mutsumi Kawato, a Japanese manga artist born in 1979 in Tone, Ibaraki Prefecture, Japan. He began his professional career in 2000 when he received an honorable mention in the 55th Weekly Shōnen Champion Newcomer Award for his work Twin Burner. His debut serialized manga, Muteki Kanban Musume, launched in the same magazine in 2002 and ran until 2006, spanning seventeen volumes. This series is his most recognized work and is known internationally under two titles: the manga was released in North America as Noodle Fighter Miki, while its anime adaptation was licensed as Ramen Fighter Miki. The anime, a twelve-episode television series directed by Nobuo Tomisawa, aired in Japan in 2006 and was later released in North America by Media Blasters.

Following the conclusion of the original series, Sadogawa continued the story with Muteki Kanban Musume N, a five-volume sequel serialized from 2006 to 2007. Throughout his career, he created several other manga series for Weekly Shōnen Champion. These include Punisher, a fantasy series that ran from 2008 to 2010 and was collected in seven volumes, and Hanza Sky, published from 2010 to 2012 and spanning thirteen volumes. At the time of his death, he was working on a comedy series titled Amane Atatameru, which was left unfinished after two volumes. Sadogawa was also known to be a practitioner of karate, a background that occasionally informed the physical comedy and character traits in his action-oriented narratives. On August 13, 2013, at the age of thirty-four, he was found deceased in a park in his hometown of Tone, with police suspecting suicide.