Bleach: Thousand-Year Blood War is not a regular numbered season of the original Bleach anime; it is its own sequel series, and Season 1 corresponds to the first cour of TYBW.

Episode count

  • TYBW Season 1 has 13 episodes.
  • The overall TYBW anime has been listed with 40 episodes on Wikipedia as of the current page snapshot.

How it maps

  • TYBW Part 1 / Cour 1 = Season 1.
  • Later parts are treated as separate cours/continuations rather than one long single season in many listings.

Simple answer

If you’re asking “which season is TYBW Bleach episode number,” the safe answer is: TYBW starts with Season 1, Episode 1, and Season 1 covers the first 13 episodes.