InuYasha Episode 122: The Power of Banryu: Duel to the Death on Mt. Hakurei
Episode 122 of 167 of InuYasha, aired August 11, 2003, 24 minutes. Available with English subtitles and dub where released.
Episode summary
Inuyasha battles with Bankotsu, who is using Banryu, a weapon infused with a demonic aura. Kagome senses that the Shikon shards inside Mt. Hakurei are becoming tainted.