[1][2][3] Kubonouchi made his professional career debut in 1986 with the short story Okappiki Eiji published in the manga magazine Shōnen Sunday.
[citation needed] From 1988 to 1991, he worked on his first series, Tsurumoku Dokushin Ryō, which was in 1991 made into a movie with Kōyō Maeda (ja) in the leading role.
[citation needed] After a 7-year hiatus,[citation needed] Kubonouchi began Chocolat, a story about a former mob boss, just having been released from the prison, who befriends a 16-year-old girl.
Chocolat was published from October 1999 to September 2003 in Big Comic Spirits.
[2] In 2003, the manga was made into a television drama,[4] that lasted 45 episodes.