As far as I know, Akiyama used the Sternness Dust only twice, both times pinning Shiga. In a singles match on 12/07 and in a GHC title match with partner Saito (1st def) against Kobashi & Shiga on 10/19, so the debut would be 10/19.
Kobashi, I think, used the Diamond Head only once, in a tag match on 10/17 that himself and Shiga won against Akiyama & Kanemaru. He spiked Kanemaru with it...
Look for them to use these moves on each other when Kobashi wins the TC against Misawa... He's probably gonna win against Akiyama with the Diamond Head (like the Burning Hammer wasn't enough!) and Akiyama might defeat Kobashi with the Dust...
The whhhaaaat??? What are these moves? I guess the involve head dropping, but can anyone give me a description or better still an image or video clip? Sorry if I am being stupid, but I don't follow NOAH closely!