Board Thread:Theories and Speculation/@comment-3001903-20150829033326/@comment-6036561-20150829182406

Omojuze wrote: Same question could be applied for Kurotsuchi: Why didn't Onoki teach her "Dust Release" Or his (supposed) son? Most logical answer: There is either a restriction on who can learn it OR it requires a certain status to be taught.

I think the "restriction" is, as stated before, you must have elemental affinities to Wind, Earth and Fire to be able to learn Dust (now the question is why Oonoki never used a KKG if he has three elemental affinities, but it is not the point of the discussion XD ) In the case of Kitsuchi and Kurotsuchi, the answer is simply that having a father with a certain elemental affinity does not imply that you will inherit it. That's the case with Tsunade and his father / her mother: no one of them inherited Hasirama's Wood Release. Or with Kankuro and Temari (I've left Gaara out of this due to the Sandstorm Mirage novel): they didn't inherit Rasa's Magnet Release.