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Something to the effect of Fire Element or something to do with fire. An elemental classification of jutsus used in the Naruto series.
Katon : Goukakyuu no Jutsu!
by Haka April 23, 2006
an absolute dumb shit that thinks hes a stud, but hes a retard.
Look at that guy, hes such a katon
by ethduck February 24, 2010