Hōsenki I

is an oyster-demon who cultivates a variety of magical jewels.

He created the Black Pearl in InuYasha's right eye that enabled Sesshomaru to travel to his father's grave and try to steal Tetsusaiga, the sword his father willed to InuYasha. Later in the series, InuYasha's group needs to travel to the nether world and seek out Hosenki, but learn he has died and his son, who shares his name, can not make the gems yet. They find another path to the world where they find the departed Hosenki sitting among the bone's of InuYasha's father's body. However, he had been corrupted by a shard of the Jewel of Four Souls and attacked InuYasha. After Naraku reclaimed his shard, Hosenki returned to normal and taught InuYasha how to use Tessaiga's Kongosoha attack.

Hosenki’s seiyu is Ōtomo Ryūzaburō, so he has the same voice as Crocodile from One Piece and Dabura from Dragon Ball.

Abilities:

Adamant barrage: Hosenki is the original wielder of this powerfull technique.He is able to send a shower of adamant shards to injure his enemies .It is powerfull enough to penetrate Naraku's barrier and it is the only technique that is able to do so.Also it is powerfull enough to destroy large parts of the cliffs that sorounds the Border beetween life and afterlife

Adamant Armor:Hosenki is covered in adamant and because of that he has an incredible defense because tha adamant is considered the strongest substance in the world.His defenses are able to withstand Inuyasha's Kaze no Kizu and reapeted blows from Inuyasha's Tetsusaiga without much trouble.His defenses can steel be breached because of the corupion of Naraku that weakend Hosenki greatly.

Super strength: He is powerfull enough to hit inuyasha and send him flying .After the hit Inuyasha lost counciosness for a short amount of time