Shaman King (2001)

Name: Shaman King
Released: 2001

Asakura Yoh is a shaman, a person who communicates with ghosts. He enters the Shaman Fight, for whoever wins the tournament gets to commune with the Great Spirit, God... that and his fiance Anna wants to be the wife of the Shaman King. Helping him are his friends Manta, Horo Horo, Ryu, and his samurai ghost partner, Amidamaru.

Genres: Animation, Action & Adventure, Sci-Fi & Fantasy

What to watch after Shaman King

Yona of the Dawn (2014) — Similar consistency, season to season
Cardcaptor Sakura (1998) — Two steps away in the credits
Fairy Tail (2009) — Same subject: shounen
Inuyasha (2000) — Same subject: supernatural, shounen
Noragami (2014) — Same subject: supernatural, ghost
Claymore (2007)