1. Naruto Manga and Anime:
* Early Chapters and Episodes: The initial chapters and episodes of the Naruto manga and anime delve into Naruto's childhood, showcasing his loneliness, his desire for recognition, and his training under Jiraiya.
* Flashbacks: Throughout the series, various flashbacks reveal important childhood experiences of other characters like Sasuke, Kakashi, Sakura, and many more.
2. Naruto: Shippuden Manga and Anime:
* Shippuden Arcs: The "Land of Waves" arc, for instance, provides glimpses into Kakashi's childhood and the tragic events that shaped him. Other arcs, like the "Itachi Uchiha" arc, shed light on Sasuke's childhood and his bond with his brother.
* Filler Episodes: Some filler episodes in Shippuden offer more details about character backstories and childhood moments.
3. Naruto Novels and Spin-offs:
* Naruto: Kakashi Retsuden (Novel): This novel delves into Kakashi's childhood and his relationship with Obito Uchiha.
* Naruto: Sasuke Retsuden (Novel): This novel explores Sasuke's past, his motivations, and his journey after the Fourth Shinobi World War.
* Boruto: Naruto Next Generations (Manga and Anime): This sequel series features flashbacks to Naruto's childhood as well as the childhoods of the new generation, including Boruto, Sarada, and Mitsuki.
4. Naruto Video Games:
* Naruto: Ultimate Ninja Storm Series: Some games in this series offer additional character backstories and explore their childhoods in greater detail.
5. Naruto Databooks:
* Naruto Hiden: These databooks contain supplementary information about the series, including character backstories and childhood details.
It's important to note that while not all childhood stories are directly addressed in the books, they are woven throughout the series through various means, offering insights into the characters' motivations and development.