Sairyō Ryōshi

Sairyō Ryōshi (最良漁師, The Best Hunter Four) is a title given to the four most powerful hunters in the world. To obtain this title, someone would obtain the title by killing the previous titleholder.

Overview
The Sairyō Ryōshi are meant to correlate with the four basic skills that all hunters use in battle: Hand to Hand, Swordplay, Medical and Aura Control. Each of them all unrivaled of their respective fields of combat.

History
When man had found what they now appropiately call, dust and lead their way out of the void, it was due to 4 people who had made this struggle to push mankind on top of the chain. These four excelled in their own type of arts, Hand To Hand, Swordplay, Medical and Aura Control. After, they were recognised as the first generation of the Sairyō Ryōshi.