Kurama mode is ninjutsu or senjutsu? all ninjutsu released by sage mode is senjutsu?

[morningmoon]

Let say naruto have his kurama fushion with minato'kurama. And become the perfect kura mode. It's consider as ninjutsu or senjutsu? And could it be enchanted more with naruto's sage mode?

In other hand, if sasuke using his snake sage mode to use Amaterasu, will it consider as senjutsu?