InuYasha Episode 39: Trapped In a Duel To The Death!
Episode 39 of 167 of InuYasha, aired August 13, 2001, 24 minutes. Available with English subtitles and dub where released.
Episode summary
While Inuyasha's gang follows a demon bear with a jewel shard, Koga meets with some demons from the northern pack who tell him about their plan to storm a castle where a man has many jewel shards. When the chase leads Inuyasha and his comrades to the castle, they meet up with Koga, who is furious at the slaughter of the wolf demons.