Animation studios

I've been slacking on my naruto anime watching(I read the manga as well) so catching I caught the brillant episode 133, loved it.

The animation in this ep reminds me of my favorite fight before it, the sasuke bs ORo fight which I think is ep 30. Anyway I want to know which animation house or studio did these eps because they are of the best quality throughout the series and they really need to stay on and do ALL of the fight scenes with this company.

Nara Animation. it says it in the credits.