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Yosuke Kamogawa had nothing to live for, but a mysterious pyramid appears called Yahabe! With the power to turn back time, how will Yosuke's life change? (This was released prior to Yosuke being introduced in Shaman King Flowers. As such, this may be considered his "Zero" story as part of the Shaman King universe in the future. However at this time it's not officially canon.)
From Wikipedia: Mappa-Douji - Is a manga created by Japanese mangaka Hiroyuki Takei. It is one chapter long and is the tale of Hao Asakura, a Shaman King character, as a child 1000 years ago. In this original incarnation, his name is Asaha Douji. He was named after his mother, Asano Ha, who was killed by humans for being a yokai who could see and speak with demons. After his mother's death, Asaha is left with no home and no family. He meets and befriends a demon named Ohachiyo who renames him Mappa Douji (Demon Child), to avoid confusion between his and his mother's similar names, as the kanji could be pronounced both ways. Ohachiyo teaches Mappa Douji many things, and towards the end of the story he gives Mappa Douji the demonic power of reading minds, the beginning of Hao's powerfully and dangerously gifted mind.It is not told in this story, but in the main Shaman King manga, Hao later becomes an onmyÅji, which is a hint that Hao's fictional life may be based on the Japanese legend of Abe no Seimei, a famous onmyÅji whose mother was also rumoured to be a yokai.
It follows the adventures of Yoh Asakura as he attempts to hone his shaman skills to become the Shaman King by winning the Shaman Fight.
Yoh Asakura is a shaman--one of the gifted few who, thanks to training or natural talent, can channel spirits that most people can't even see. With the help of his fiancée, Anna, Yoh is in training for the ultimate shaman sports event: the "Shaman Fight in Tokyo," the once-every-500-years tournament to see who can shape humanity's future and become the Shaman King. But unfortunately for Yoh, every shaman in the world is competing for the same prize… Related: Shaman King Flowers (Sequel) Shaman King: Red Crimson (Spin-off) Shaman King - Remix Track (Side story) Shaman King Zero (Side story)
The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised. Special collaboration between Seo Kouji (Fuuka), Hiroyuki (Aho Girl), Yoshikawa Miki (Yamada-kun to 7-nin no Majo) and Katsuki Hikaru (Baby Steps)