Training notes: Jo nage kokyu nage

In the below video Master Koretoshi Maruyama demonstrates and provides instruction for the Aikido technique kokyu nage (breath throw) where the nage is holding a wooden staff (a jo) .  This type of training is referred to as jo nage and is tested under free form conditions (taninzugake) as part of the black belt grading syllabus in our school.

Notably, in this application of kokyu nage the nage does not hold the jo in the traditional tsuki position.  Instead the jo is held vertically at head height.