Hyoho
2nd Black Belt
Yes nugu is from the verb to take off. My Ryu just holds the blade point lowered until zanshin is finished. We have never done chiburui so see no point including it now. The earliest notes I have on Embu procedure are from 1850. Sword etiquette is also done before we enter an area. Choken Battojutsu Kageryu. Renmei that do tameshigiri use the method you describe of a cloth in the keikogi.