Kinjutsu

Kinjutsu are the form of jutsus ban by a certain community. Such as the Shadow Multiplication Techniche (Also know as multiple shadow clone jutsu. In episode Naruto learned this jutsu by stealing the First Hokages Scroll of Sealing. The Forbidden jutsu the Fouth Hokage used to seal the Nine-Tailed Fox inside Naruto was a Kinjutsu, so he had to commit suicide. Orochimaru and Itachi Uchiha are big Kin justsu users. Kinjutsus are only allowible if the get the permission of the Kage of your village.