Re: Japanese, Aikido word- for leading?
I would add "michibiku" as another word for "to lead" or "guide" that I've heard in an aikido context.
In training I've heard "Kokyu" used to describe a number of things apart from breath. The most common seems to relate to otherwise nameless ki-no-nagare throwing techniques (done by leading/blending), but in lineages close to the founder it refers to a distinct mind and body skill ("kokyu-power" of which breath is just part). It is also sometimes just called "Aiki" although in my experience so far, that seems to be mainly in the application of the skill. Also, IMO, this concept of kokyu ryoku = the internal power / internal strength of much debate on this forum.