Kaibutsu-kun

Kaibutsu-kun (怪物くん) is a manga and anime series by Fujiko Fujio named after its protagonist.

About
Kaibutsu-kun and his companions, Dracula, Wolfman, and Franken, travel from Monster Land to the Human Realm, where they encounter and battle several monsters, mainly assassins from the demon group Demonish, especifically Bem, the alien. To make things interesting Kaibutsu kun's friendship with a human boy Hiroshi, who lives with his sister Utako, and he wants to make her happy.

Cast

 * Tarou Kaibutsu (怪物太郎,) - A little boy who can metamorph.
 * Seiyū: Fuyumi Shiraishi ('68), Masako Nozawa ('80)
 * Hiroshi Ichikawa (市川ヒロシ,) - Taro's friend, who lives with his sister Utako.
 * Seiyū: Minori Matsushima ('68), Katsue Miwa ('80)
 * Utako Ichikawa (市川歌子,) - Hiroshi's older sister. Both orphans, she takes care of her brother.
 * Seiyū: Mariko Mukai ('68), Chiyoko Kawashima ('80)
 * Dracula (ドラキュラ) - He drinks tomato juice instead of human blood.
 * Seiyū: Hiroshi Ohtake ('68), Kaneta Kimotsuki ('80)
 * Wolfman (オオカミ男,) - The housekeeper; puts "gansu" at the end of every sentence.
 * Seiyū: Shingo Kanemoto ('68), Takuzou Kamiyama ('80)
 * Franken (フランケン) - Like his Hollywood counterpart, he's big, and not too smart.
 * Seiyū: Masao Imanishi ('68), Taro Sagami→ Shingo Kanemoto ('80)
 * Kaiko-chan (怪子ちゃん) - Taro's girlfriend.
 * Seiyū: Eiko Masuyama ('68, '80)
 * Doctor Noh (ドクター・ノオ)
 * Seiyū: Reizō Nomoto ('80)
 * Bem (銀行)
 * Seiyū: Hiroshi Ohtake→ Shun Yashiro ('80)
 * Kaibutsu Daiō (怪物大王,)
 * Seiyū: Dai Kanai ('80)
 * Demokin (プリンス・デモキン)
 * Seiyū: Eiko Yamada ('80)
 * Kizao (キザオ)
 * Seiyū: Sanji Hase ('80)
 * Ako (アコ)
 * Seiyū: Keiko Han ('80)
 * Banno (番野)
 * Seiyū: Kiyonobu Suzuki ('80)

Spin-offs

 * Hello, Hiroshi and Utako (2010-2011)
 * Utako-Shon-kun (2011 ??)

Live Action
The 2010 drama version.

Main casts

 * Satoshi Ohno as Kaibutsu-kun
 * Norito Yashima as Dracula
 * Ryuhei Ueshima as Wolfman
 * Choi Hong-man as Franken