+ Soul Eater (?)
+ Jujutsu Kaisen (?)
Not sure if they consider as a ninja anime. If you don't mind samurai anime.
+ Gintama Series
+ Samurai Champloo
+ Sword of the Stranger(Movie)
+ Rurouni Kenshin
+ Dororo(2019)
I know that Samurai and Ninja are different, but not in the case of Action.