Hida Atarasi

Hida Atarasi, son of the Kami Hida and a mortal woman, was chosen by Shinsei as one of the first set of the Seven Thunders. He helped to form some of the techniques for the Hida Berseker School of the Crab Clan, including the kata Hida's Avalanche. He was slain fighting against Fu Leng, though he rose again as an Akutenshi.

In the year 210, Hida took up his tetsubo and marched off to find and destroy the Tainted abomonation that his son had become. They fought for some time, and the sheer energies that the divine father wielded against his infernal son scarred the land. Finally, Hida struck the killing blow, and defeated Atarasi. After this he prayed to his mother, Amaterasu to save the soul of his son, and then succumbed to the wounds he had taken during the fight. The Lady Sun blessed the ground upon which they had fought, creating the region in the Shadowlands known as Amaterasu's Furnace, a place that has forever since remained pure and free of the Taint.

According to the accounts of Iuchi Karasu he witnessed the fight between Hida and Atarasi, though whether this was a result of his tortune at the hands of Moto Tsume, or perhaps some trick of the semi-sentient Shadowlands itself is unknown. It remains possible as well that Hida and Atarasi still fight, and the legends of Hida's victory may simply be that, legends told by the Crab Clan to show that the strength of purity can always overcome that of corruption, and that even if your own son carries the curse of the Taint, you must not shy away from your duty.

Information gathered from multiple sources, L5R RPG 3rd Edition, Bearers of Jade, Way of the Crab and Secrets of the Crab.