The Ninja of Benisu

is episode 224 of the Naruto: Shippūden anime.

Summary
During their voyage, Naruto, Yamato, Guy, and Aoba stop at an island to recover from severe seasickness. There, they unexpectedly meet up with Sakura, Ino, and Chōji who are on an assignment to gather medical herbs under instruction of Tsunade for the upcoming war. Ninja from Benisu Island are also collecting medical herbs and have taken almost all of the herbs on the island, which they intend to sell on for money to fund their village. After an encounter in a cave on the island where Naruto saves the Benisu ninja and offers them the service for free, they decide to give Konoha half of the herbs they collected in gratitude.