Re: Defining Kokyu
Usually, I just translate it into Latin first, then English: "Kokyu"- "in spirare" - "inspiration".
I suspect that Ueshiba's use of "kokyu" was closer to way "spirare" came to be used, relating it to the indwelling of the spirit or to the breath of God. He had a Numious experience and used the language of his religion and martial culture to describe it. Perhaps he and the Western philosophers were describing the same experience, filtering it through their different languages and cultures.
Maybe it's a conspiracy, which is to say they "breathed together".