Which one is Kyubi no Youko's secret book of connecting Naruto?

Kyubi no Youko Naruto's secret volume refers to the letter of Inoue Zhongtian, because this secret volume was very important in the Fourth Endurance World War, because it recorded the story of Inoue Zhongtian and predicted the future. Naruto and other ninjas in Kyubi no Youko went to look for this secret book, which showed its importance. Judging from the animation plot, this secret book was left over by the fourth generation Huo Ying, the father of Naruto in Kyubi no Youko, so it is called the exclusive secret book of Naruto in Kyubi no Youko.

Naruto in Kyubi no Youko is Naruto Uzumaki, the hero of Japanese manga Naruto and its derivative works. Ninja Kimura, the son of Namikaze Minato and Uzumaki Kushina, the fourth generation of Huo Ying, and the reincarnation of chakra, the second son of Ootutuki Hagoromo, Asura. When he was born, his parents died to protect the village and sealed bijuu Kyubi no Youko in Naruto. Naruto, an orphan, was discriminated against by villagers since he was a child, but with the encouragement of Umino Iruka, the only teacher who agreed with him, and Sarutobi Hiruzen, the third generation of Huo Ying, he had the dream of becoming a Huo Ying.

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Because of Kyubi no Youko's attack on Konoha, four generations of Huo Ying sealed the chakra of Kyubi no Youko on Naruto, who was still a baby at that time. Four generations under one roof had hoped that the villagers of Konoha would regard Naruto as the hero of the village, but the villagers generally regarded Naruto as the embodiment of Kyubi no Youko who destroyed the peace of the village, so they treated Naruto coldly. So Naruto gradually developed a rebellious character. Naruto's grades in school are very poor, and he likes to play practical jokes. He hopes to make a fire shadow and get everyone's approval. His greatest feature is eccentric and outspoken.

Often become the laughing stock of other students, but also make teachers very headache. Later, Naruto was recognized by Iruka, the teacher of Ninja School, and gradually grew up. Iluka's parents both died in Kyubi no Youko's attack on Konoha. Although it was difficult for Iruka to accept Naruto at first, as he spent more time together, he discovered Naruto's inner loneliness, gradually accepted Naruto, and understood why he wanted to be recognized by everyone, because Iruka had the same expectations for everyone when he was a child.

Reference to the above content: Baidu Encyclopedia-Naruto Uzumaki