"Naruto's Great Eruption!!" (ナルト大噴火!!, Naruto Daifunka!!) is chapter 431 of the original Naruto manga.
Naruto has Gamakichi take Tsunade to safety. The Animal Pathsummons a variety of animals to attack him, but he parries them all and leaves their defeat to his toad allies. While the summons are eliminated, Naruto defeats the Preta Path. He then prepares to finish the battle.
When giving Naruto Katsuya, Tsunade refers to her as "he".