Is Bleach episode 365 filler?
Canon No, episode 365 of Bleach is canon.
#365
Ichigo vs. Ginjo! Secret of the Substitute Badge
一護VS銀城!代行証の秘密
Aired 20 Mar 2012
Mochibayo compiled this list from MyAnimeList's labels, because MyAnimeList's episode data is not reaching us at the moment.