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Team 7's instructor Kakashi Hatake is one of the most beloved characters not just in Naruto, but in anime as a whole. No matter how popular he might be, there will always be a few bits of Kakashi Hatake trivia that even diehard fans aren't aware of.
There are plenty of interesting things you didn't know about Kakashi to talk about, ranging from the meaning of his name and his mission stats to important details about his childhood and his powers that might have been forgotten. There's also information about what Masashi Kishimoto, the creator of Naruto, intended for the character - did you know that he was originally supposed to be a strict, serious samurai?
Kakashi's mask has been the subject of some serious speculation. Just what is he hiding under there? While a filler episode postulated all kinds of ridiculous answers, including swollen red lips and enormous buck teeth, he's actually hiding a completely normal face with a small mole on his chin. What's not revealed is his reason for being so secretive in the first place.
Like most of the characters in Naruto, Kakashi's name wasn't chosen arbitrarily. Rather, it was chosen for its specific meaning. His given name, Kakashi (カカシ), means 'scarecrow' and his surname, Hatake (はたけ), means 'farmland' or 'field.' Kishimoto considered a number of other names for him, including Enoki (nettle tree), Kuwa (hoe), Botan (peony), and Kama (scythe). Kishimoto believes that he chose the best name for the character.
As an important character in the world of Naruto, it's only natural that Kakashi would be appearing in spin-offs - but it's not a given that he'd star in any of them. Kakashi Hiden is one of several spin-off light novels focusing on different characters from the Naruto-verse. The book details Kakashi's decision to let Naruto gain a little more life experience before becoming hokage, and take over the position himself until his student is truly prepared.
Kishimoto has also claimed that if Naruto were to ever receive another spin-off, his first choice for a protagonist would be Kakashi. The story would most likely focus on his years as a jounin, focusing on the missions that earned him the fame he currently enjoys.
Kakashi may not be as lewd as characters like Jiraiya, but he's still channeling that deviant energy. His favorite book series, the Icha Icha series by the aforemetioned Jiraiya, contains plenty of naughty materials, and Kakashi has no qualms about reading them in front of his students.
Also, according to a spin-off manga called Rock Lee's Springtime of Youth Full Power Ninja Chronicles, the real reason that Kakashi wears a mask is to keep others from seeing his bleeding nose - anime shorthand for arousal.