Re: The two body/mind concepts of Japanese Martial Arts.
Greg, you're right, I misspelled it. Mingmen is Du4, and considered the point of the yang of the kidney,which is also used for ki. Yaoyangguan is Du3, but not used for much in martial arts.
In daoism, menming is used as a dantian, but placed about an inch inside the body, not the same place as acupuncture, for the most power. Many chinese styles, including many taiji styles, use this, instead of the point of original chi, for their power point.