um.... hijutsu is not "hidden jutsu" hijutsu is bloodline jutsu.
And Kinjutsu is not "too powerful for any ninja"... Orochimaru performed MANY forbidden jutsu. And both Naruto and Lee also use Kinjutsu.
Here is the list of different jutsu.
Fuuinjutsu - seal jutsu
Genjutsu - illusion jutsu
Ninjutsu - (idk the correct english term) skill jutsu? idk elemental, anyways.
Taijutsu - hand to hand combat.
Other Skills - (water walking, tree climbing, Muon Satsujin Jutsu)
Doujutsu - eye jutsu
Kinjutsu - forbidden jutsu
Hijutsu - Bloodline Limit (more often known as Kekkai Genkai)
There's also puppet jutsu.
You can read more about jutsu here: http://www.leafninja.com
Oh, wrong section; BTW. this belongs in the Naruto Section