Demonstration of all standard forms of Seitei-Iai, to be called ZNKR-Iai (Zen Nihon Kendo Remei) according to the language regulation.
Demonstration in Kyoto 2016 by Kusama-Sensei, Komei Budokan, 8th Dan (says Google Translate). Can it be that ZNKR-Iai has a calming effect? On the left in the background at 8:34 there is a warm yawn (I mean, wrongly).
Demonstration in 2017 from a different perspective.