Icha Icha

is a series of best-selling novels written by Jiraiya. Little is known about the plot, but it is known to be about a passionate love between a man and a woman. Kakashi Hatake is a big fan of the series and is shown reading one of them most of the time. They are comedic (and likely adult) recounts of Jiraiya's experiences in love. They are meant for people of 18 and over.

Known Books

 * : The first book to appear in the series. In Naruto the Movie: Ninja Clash in the Land of Snow, Yukie Fujikaze stars in a movie-adaptation of this book.
 * : The second book. It also became a movie, as seen in episode 101.
 * : The third book. Naruto Uzumaki gave this book to Kakashi when he returned to Konoha following his two-and-a-half year training with Jiraiya, and as such it was the newest installment in several years. When Jiraiya sent the secret of Pain's identity to Konoha, he used the first word from various pages in the book to decode his message: "The real one isn't among them." As a result of Jiraiya's death, this is the last book in the series.
 * Icha Icha Strap: A book only seen in the game Naruto: Ultimate Ninja 3 that can be given to Ebisu.
 * : The first book in a Swimming sub-series, as seen in episode 15 part 1 of the anime adaptation of Rock Lee's Springtime of Youth Full Power Ninja Chronicles: The Pool's Finally Open!.
 * There is also an unofficial Icha Icha novel that was written by Naruto Uzumaki in episode 177. Naruto finished the manuscript for Jiraiya (so that Jiraiya would train him again) and accidentally sent it to the wrong place (the Land of Fangs). The book was mistaken for a peace treaty, and, since the daimyō enjoyed it, he afterwards ended the war with the Land of Claws.
 * In addition, the Rock Lee and His Ninja Pals spin-off has also shown other similar books such as Ero Ero Install, Icha Icha Emotion, Icha Icha Dynamic, and Ero Ero Install. Icha Icha Pooltime was also featured.