ドラゴンの玉座 (Throne of the Dragon):

Housed in the northeastern continent of 神々の国 (Land of Gods), Throne of the Dragon is a capital city to one of the three warring factions in that area. Though considered a martial giant in it's own right, the country has suffered more infighting and inner turmoil then it's rivals. Having been home to countless generations of dragons, the people have formed a symbiotic relation with some of their primal neighbors -offering tribute and homage for protection. Needless to say this does not apply to all the dragons, some have taken to pillaging and raiding different villages to bolster their hoards. Other's however banded together with the humans under a single great dragon, know as the Head Wyrm.
It was during these raids that a warrior clan known as the Ryukaze came up with an idea. Who better to teach you to fight a dragon, then a dragon itself. Needless to say, at first the relations were tense between the beastly masters and their human students. Rogue warriors would kill their masters and proceed to use their new found strength to become bandits, or the dragon would kill the student due to impatience and draw the ire of his people. But over time, a mutual respect was formed and the warriors saw new heights to their training.
This created the Dragon Bane culture, a breed of warriors that had been taught the way of combating dragons while in flight. Though most of the training is done in practice over application, a ceremony is held for those who've reached the end of their training and are ready to assume the mantle. Called the 'Ascension' ceremony, the trainee must slay a dragon in a duel. Most of the time, these dragon's were captives that were held for the very purpose of fighting in the Ascension, others were dragons too maimed and wounded to continue fighting and would request to die in combat. This practice is observed by the Head Wyrm and Shogunate, to ensure that the honor of both warriors remain intact, while acting as a witness to this rite of passage. Once the final blow has been struck, the warrior will recite a prayer over the corpse of his foe, and turn to the Head Wyrm. If the Dragon Lord is pleased, a simple nod would be all that is needed to excel this warrior forward to this new status. However, should the drake shake his head, either displeased or insulted by the display, the warrior will have to start training from the start or commit ritual suicide to atone for his dishonor.
Those that do succeed, have their armor and weapons crafted from the very dragon they faced in combat, wearing it as a badge of honor and pride. At this point, the weapon is up to the warriors choice, but most favor a Nodachi for it's size and striking power. Considered nobles of the land, they act as peace keepers and key retainer's in their daimyo's armies. However, it is not uncommon for the warrior to become more then an entitled tyrant or bandit, yet those caught in the dishonorable acts have their titles stripped and forced from the land, if they don't attone for their sins first by their own blade first.