The Fourth's Legacy!! (四代目の遺産!!, Yondaime no Isan!!) is chapter 143 of the Naruto manga.
Knowing that Itachi and Kisame are after Naruto, Kakashi recalled about an earlier conversation he had with Jiraiya. Jiraiya informed Kakashi that he would thereafter being looking after Naruto, fearing that an organisation called Akatsuki might someday come after him because of the Nine-Tailed Demon Fox sealed within him. Knowing Itachi is part of Akatsuki, Kakashi asks if this is correct. Angry that Kakashi knows about their organisation, Itachi instructs Kisame to capture Kakashi. As Kisame moves to attack Guy appears and repels him. Seeing that things are becoming too difficult, Itachi leaves with Kisame. Meanwhile, Jiraiya tries to convince Naruto to help him look for Tsunade. Naruto has no interest until hearing that he can learn a technique stronger than Sasuke's Chidori, at which point he eagerly accompanies Jiraiya out of Konoha.