Off topic,I think there is an irrelevant typo in your post. You wrote:
Dr Kano sent Yamada Sensei to study Aikido with Morihei Ueshiba Sensei after the war
I suppose you mean Risei Kano as Dr Kano (Jigoro Kano) passed away in 1938. Yamada Sensei was 14 years old when Dr Kano died.