DAN - 'Leader', grade, generally Black Belt.

DE -(v.DERU) - To come out, to advance. (e.g. deashiharai).

DO - (a) Way, path, etc. This word was used frequently in Chinese and Japanese philosophy in the sense of the way of doing an act in the moral and ethical spheres well as the simple physical. Professor Kano 'borrowed' it from these sources.

(b) Trunk of the body.

DOJO - Hall or room in which judo is practised.