"Handing Down Senjutsu…!!" (仙術伝承!, Senjutsu Denshō!) is chapter 409 of the original Naruto manga.
Naruto wishes his friends in Konoha good luck with the investigation into Pain. Fukasaku reminds them to send for help if they need it before going to Mount Myōboku with Naruto. When they get there, Fukasaku informs Naruto that learning senjutsu requires he become one with nature. Once mastered and combined with his own chakra, Naruto will achieve Sage Mode. Naruto asks where to start, which Gamakichi says to be by dying. Meanwhile, Taka locates Eight-Tails' jinchūriki.