Gege, the creator of JJK, was heavily inspired by Kubo's Bleach. One of his main characters is based on a Bleach character.

Tite Kubo delved into the Arrancars’ relationship with Aizen quite a bit in Bleach, but it still doesn't make sense for them ...

Tite Kubo revealed in an interview that there is one Bleach character who might have intimidated Aizen enough to avoid her.