Strongest under the Sun Tournament

The Strongest under the Sun Tournament (太陽下一武道会, Taiyōka'ichi Budōkai), or often abbreviated as the SxS Tournament, is a massive tournament that takes place every three-hundred years in varied locations to determine the strongest warrior in all the realms of both the living and the dead.

Seventeenth SxS Tournament
Its winner was Kamui after his victory over Genryūsai Shigekuni Yamamoto.

Nineteenth SxS Tournament
Its winner was Seireitou Kawahiru after his narrow victory over Ryun Seijūrō.

Twenty-First SxS Tournament
Currently in progress. Entering is Team Kuramoto.

Behind the Scenes
This is heavily based on the World Martial Arts Tournament from Dragon Ball, the Dark Tournament from Yu Yu Hakushō, and the Desperate Fight of Disciples "D of D" Tournament from History's Strongest Disciple Kenichi.