Gensoumaden Saiyuuki
English title: Saiyuki
Japanese title: 幻想魔伝 最遊記
Type: TV
Episodes: 50
Premiered: spring 2000
Source: Manga
Genres: Action, Adventure, Drama, Fantasy
Studios: Pierrot
Producers: TV Tokyo, Dentsu, Group TAC
Duration: 23 min per ep
Rating: R - 17+ (violence & profanity)

Many years ago, humans and demons lived in harmony. But that unity ended when demons started attacking humans and plotted a mission to unleash Gyumao—an evil demon imprisoned for thousands of years. Now, Genjo Sanzo, a rogue priest, must team up with three demons—Sha Gojyo, Son Goku, and Cho Hakkai—and embark on a perilous journey to the west to stop these demons from resurrecting Gyumao and restore the balance between humans and demons on Earth.

(Source: ANN)