Gutsy Master and Student: The Training

is episode 187 of the Naruto: Shippūden anime.

Synopsis
Naruto and Jiraiya left Konoha to begin their three year journey. While they travelled, they talked about Naruto's need to overcome Sasuke's Sharingan which has the ability to force a ninja under genjutsu. Jiraiya summons Gamariki to place Naruto inside Genjutsu Kiss to practice breaking out of genjutsu techniques. Naruto tries to disrupt his inner chakra flow, but instead, creates a wave of chakra around him thus hitting Gamariki in the physical world. Jiraiya decides Naruto is not ready to try and break out of genjutsu techniques. Thus, they leave to Genjutsu Tree Village to train there, because it has natural genjutsu affinity. Jiraiya realises something is wrong in the once benevolent village as a villager he once knew acts hostile toward them and asks them to leave. Jiraiya and Naruto find out that Kandachi has come there to hide from Amegakure pursuit and has taken over as a violent dictator.

Trivia

 * Tsunade's face is already carved into the Hokage Monument, even though in the anime, it was carved during the timeskip.
 * This episode does not begin with a flashback from one of the characters.