Episode 186

Kohaku's Shard is the 19th episode of InuYasha: The Final Act.

Plot
Kagome returns to her own world to rest and study for her final exams, Inuyasha follows her there after several days of her absence. Miroku and Sango are left to look after Rin, Jaken and unconscious Kohaku. Sesshōmaru, meanwhile, chases after the evil spirit of the jewel, Magatsuhi to destroy him. But Sesshōmaru's departure is only part of a trap set up by Byakuya of the Dreams. The real Magatsuhi attacks Kaede's village and while everyone is distracted by hordes of demons, he slips in Kaede's house to attack the sleeping Kohaku. Miroku and Sango fail to notice until too late and the demon has possessed Sango's brother, intending to deliver the final shard to Naraku. Miroku and Sango desperately try to stop him, Miroku and Rin are poisoned and Sango badly wounded by Kohaku.

Magatsuhi then escapes. Kagome and Inuyasha return in time to sense something terrible has happened and rush to Kaede's village. They find Miroku and Sango lying in the ruins of Kaede's home. They discover the poison has reached Miroku's chest once more, almost to his heart. Miroku is uncertain what will kill him first, his torn Wind Tunnel or Magatuhi's poison. Kagome and Inuyasha leave them to recover and head after Kohaku. Sango dresses for battle even with her injuries, telling a concerned Shippō that killing Naraku will not only save Kohaku but Miroku as well. Before leaving she checks on Miroku, looked after by Kaede. She begs Kaede to leave her and Miroku alone and kisses him after praying for him to survive. Kohaku meanwhile is being lead to Naraku by Magatsuhi, who almost succeeds in taking the shard before Inuyasha and his friends arrive. Kohaku's mind is caught in the nightmares of killing his father and comrades. Suddenly, he is drawn into a vision of his sister  looking after Miroku. Sango begs for Kohaku to help her. Kohaku awakens, breaking free from Magatsuhi.