An A-Rank Mission: The Contest

is episode 309 of the Naruto: Shippūden anime.

Summary
Naruto arrives to help a team of Allied Shinobi Forces led by Karui, who are struggling against a reanimated samurai, whom Naruto recognises as a man he met on a previous mission.

Trivia

 * The clothing Naruto and Chōji wear for the eating contest are the same clothing they wore during their childhood.