Sorry, Toritoribe, I haven't learned it yet.
I presume I got confused because I'm used to seeing は near the beginning of the sentence.
And only now I saw something.
Shouldn't it be:
忍術の学校??
Thank you all.
P.S. In Brasil, here, the translation for 木ノ葉隠れの里 is The Hidden village of Leaf. Just for curiosity!