Traveling to Mount Myōboku, one of the legendary Three Great Sage Regions, would take a month by normal means. But Jiraiya had a shortcut.
The most direct and effective method was the Reverse Summoning Jutsu.
Jiraiya formed a series of hand seals with practiced ease and summoned a messenger frog. After giving it a few instructions, he asked the little frog to return to Mount Myōboku first and deliver word to Sage Fukasaku that he would be bringing his disciple, Uzumaki Naruto, along with Uchiha Satsuki, whom Naruto had specifically asked to join them in an attempt to learn Sage Jutsu.
Bringing Satsuki along had not been a spur-of-the-moment decision. Naruto had privately and seriously asked Jiraiya before whether Satsuki might also have the chance to try learning Sage Jutsu.
He had given it much thought—Satsuki's future path of growth, especially the evolution of her Sharingan... Naruto could no longer be certain that Satsuki would one day be able to awaken the Mangekyō Sharingan with absolute certainty.
In his heart, Naruto harbored a sense of regret over that "Night of the Clan Massacre."
Whenever he recalled what had happened that night, and the instant Satsuki awakened her Three Tomoe Sharingan, he felt a wave of self-reproach and thought himself a bastard.
He did not want Satsuki to need some unforgettable "loss" or "pain" in the future to awaken her power, such as the Mangekyō Sharingan. It was a way of trading harm for strength.
He could not accept it, and he had resolved to prevent it. If the path of Sage Jutsu could offer Satsuki a powerful, stable means of growing stronger without sacrifice, then that would undoubtedly be the best choice.
After hearing this, Jiraiya had cautiously contacted Mount Myōboku. After speaking with Sage Fukasaku, the answer he received