Board Thread:Theories and Speculation/@comment-36342497-20180726162715/@comment-9782468-20180813191140

Kakashi can use both Earth and Water Release extremely proficiently but he cannot use Mud or Wood Release.

He even had the Sharingan while fighting with Yamato. Why hasn't he used Wood Release?

Because he doesn't have the natural born ability to use it. You have to be born with the ability to use both at once. You can't just try really hard for it