Jan Max Bunzel wrote:
How do you reach to the conclusion tha "Musu" (産) in "Takemusu" is the same musu as in musubi (結び)?
I think it is in the book Takemusu Aiki where the Founder writes "musubi" with the characters "umu" and "hi" birth and light/day. I have seen his calligraphy somewhere with the same. Interestingly, if you reverse the characters, you get "nissan," the name of the Japanese car company. So the idea is not just limited to Aikido.