Kakashi Hatake was the Sixth Hokage of Konoha until Naruto Uzumaki took over the position.
He is known to possess many powerful ninjutsu, however some of them are not used much by him for special reasons.
1. Raiden
With the help of a shadow clone, the two Kakashis will perform Raikiri (Thunderbolt) then connect them together.
But Kakashi rarely uses it because it’s too wasteful of chakra and complicated.
2. Rasengan
Rasengan is a ninjutsu created by Fourth Hokage Minato Namikaze.
However, because it was impossible to incorporate natural chakra into it, Kakashi created the Chidori instead and never used the Rasengan in actual combat.
3. Bat Mon
The Eight Gates is a forbidden jutsu used by Mighty Guy and Lee.
Because of its danger, Kakashi rarely uses it.
4. Raiton: Raijuu Tsuiga
Raiton: Raijuu Tsuiga (Thunder Release: Thunder Beast Escape Technique) is originally a variant of Raikiri.
The reason why Kakashi is not used much is because it requires a higher level of chakra transformation, and is not as convenient as Raikiri.
5. Taju Kage Bunshin no Jutsu
Taju Kage Bunshin no Jutsu is a higher level of Kage Bunshin no Jutsu.
In the Shinobi World, not many people can use this jutsu because of the huge amount of chakra it consumes.