Naruto is learning the elements of Wind Style Jutsu, and Kakashi lectures him on the difficulties of developing a new jutsu.
it wouldn't have been necessary
for me to develop the Chidori.
non avrei avuto bisogno
di sviluppare il Mille Falchi.
eu não teria que ter 
desenvolvido o Chidori.
мне бы не пришлось развивать Тидори.