Kyuta, a boy living in Shibuya, and Kumatetsu, a lonesome beast from Jutengai, an imaginary world. One day, Kyuta forays into the imaginary world and, as he's looking for his way back, meets Kumatetsu who becomes his spirit guide. That encounter leads them to many adventures.
- Genre: Action, Adventure, Animation, Drama, Family, Fantasy
- Studio: Gaumont, Toho, dentsu, Kadokawa, Nippon Television Network Corporation, Fukuoka Broadcasting System, Hiroshima Telecasting, Miyagi Television Broadcasting, Shizuoka Daiichi Television, VAP, Yomiuri Telecasting Corporation, D.N. Dream Partners, Studio Chizu, Chukyo TV Broadcasting Company, Sapporo Television Broadcasting Company
- Keyword: japan, runaway, parent child relationship, homelessness, training, portal, coming of age, tokyo, japan, orphan, beast, surrogate father, father figure, shadow, father son reunion, succession, anime, father son relationship, disciple, shibuya, tokyo
- Cast: Koji Yakusho, Aoi Miyazaki, Shota Sometani, Suzu Hirose, Lily Franky, Yo Oizumi