Kitarou Tanjou: Gegege no Nazo
Japanese title: 鬼太郎誕生 ゲゲゲの謎
Type: Movie
Episodes: 1
Source: Manga
Genres: Comedy, Supernatural
Studios: Toei Animation
Duration: 1 hr 45 min
Rating: R - 17+ (violence & profanity)

A completely new feature-length animation commemorating the 100th anniversary of Shigeru Mizuki's birth. The story of Kitaro's father is revealed for the first time.

(Source: Official site, translated)