"Decryption" (暗号解読, Angō Kaidoku) is episode 154 of the Naruto: Shippūden anime.


While looking at Jiraiya's code, Naruto states that the "9" they've been looking at is actually a writing quirk of Jiraiya's penmanship, and that it is actually the katakana letter "ta"(タ), something only Naruto would have known. As Naruto reveals that he only learned of the quirk due to Jiraiya's novels, the Konoha Cryptanalysis Team state that the message must have been meant for Naruto, and that the other numbers must mean page numbers from the Icha Icha series. To Kakashi's embarrassment, he is forced to read excerpts from Jiraiya's adult books out loud until they manage to decipher the code — "The real one's not among them".

After relaying the decryption to Fukasaku, who remembers Jiraiya telling him that neither of the Six Paths of Pain looked like Nagato, Fukasaku asks Tsunade's permission to bring Naruto with him to Mount Myōboku, in order for Naruto to learn Sage Mode. Naruto accepts, due to his desire to avenge Jiraiya's death, and is reverse summoned to Mount Myōboku. As Naruto and Fukasaku leave, Tsunade muses how the Great Toad Sage had predicted Jiraiya writing novels and how those very novels lead to the decryption of his code, and decides to believe in the toad's prognostication that Naruto is the Child of the Prophecy.

At Mount Myōboku, Naruto discovers that he was summoned there by Gamakichi, as toads can summon humans who have signed a blood contract with them. After having one of Shima's meals, Fukasaku explains the basics behind senjutsu, with Gamakichi simplifying it for the genin. After Fukasaku states that Naruto must learn to acquire natural energy, Gamakichi tells Naruto that he would have to die first.


RoleSeiyūEnglish Voice Actor
Naruto UzumakiJunko Takeuchi竹内 順子Takeuchi JunkoMaile Flanagan
Sakura HarunoChie Nakamura中村 千絵Nakamura ChieKate Higgins
Kakashi HatakeKazuhiko Inoue井上 和彦Inoue KazuhikoDave Wittenberg
Shikamaru NaraShotaro Morikubo森久保 祥太郎Morikubo ShōtarōTom Gibis
Fifth Hokage: TsunadeMasako Katsuki勝生 真沙子Katsuki MasakoDebi Mae West
ShizuneKeiko Nemoto根本 圭子Nemoto KeikoMegan Hollingshead
FukasakuIkuo Nishikawa西川 幾雄Nishikawa IkuoKirk Thornton
ShimaHikari Yonoよの ひかりYono HikariMary Elizabeth McGlynn
GamakichiYoji Ueda上田 燿司Ueda YōjiDave Wittenberg
JiraiyaHochu Otsuka大塚 芳忠Ōtsuka HōchūDavid Lodge
Ibiki MorinoTaiten Kusunoki楠 大典Kusunoki TaitenDan Woren
ShihoShiho Hisajima久嶋 志帆Hisajima ShihoLaura Bailey
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