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Bankotsu (蛮骨, Ban Hone) is the leader of the Band of Seven. Both the youngest and strongest member of the group, he carries the halberd Banryu. Bankotsu is a skilled mercenary and has killed many people; he retains a sense of honor and compassion, but only for his six companions.
After his resurrection, Bankotsu uses Banryu to kill everyone in the surrounding area. The scent of blood draws Inuyasha's group to engage in battle until Naraku summons the Band of Seven back to him. During the fight, Banryu is damaged by Inuyasha's "Kaze no Kizu" attack, but it gains the ability to deflect that attack after Bankotsu repairs it with the Jewel shards Renkotsu stole from Kagome. After learning that Renkotsu murdered Jakotsu for his Jewel shards, Bankotsu kills Renkotsu for his betrayal. With seven fragments in his body and two in his halberd, Bankotsu heads off to destroy Inuyasha.

In the manga, Inuyasha gradually cuts the Shikon Jewel shards out of Bankotsu's body as the battle progresses until Bankotsu is cut in two, with Naraku stripping the remaining half of its Shikon shard. In the anime, Bankotsu slays 1,000 yōkai and kills 1,000 humans with Banryu, transforming it into a demonic weapon that projects its wielder's hatred as powerful yoki. However, this proves to be his downfall as Inuyasha reflects this attack with the Bakuryūha, defeating Bankotsu and shattering Banryū.