Webthe letter that zenitsu agatsuma received in demon slayer season 4 episode 7 was written by chuntaro, the sparrow that accompanies him and informs him about the.
Webas revealed in demon slayer chapter 144, titled successors, zenitsu’s letter brought him news about the sudden death of his master and former thunder.
Webdemon slayer chapter 144 confirms what was said in zenitsu’s letter as he speaks to kaigaku in a heated discussion.
The message indicates that jigoro kuwajima,.