The sixth season of the Bleach anime series. The season adapts Tite Kubo's Bleach manga series from the rest of the 21st volume to the 26th volume (chapters 183–229), with the exception of episodes 128–131 (filler). The episodes' plot centers on the burgeoning war between the Soul Reapers and the arrancar led by former Soul Reaper captain Sōsuke Aizen.