Bleach

Season 1, Episode 251

Episode Title: Dark History! The Worst Shinigami Is Born

Air Date: 2009-12-22

Overview:

6th Division Captain Ginrei Kuchiki and Captain-Commander Genryūsai Shigekuni Yamamoto are forced to seal Kōga Kuchiki away. In the present, 6th Division Captain Byakuya Kuchiki stops Kōga from killing Muramasa.