History of Ninjutsu: Mumon no Ikkan
無門の一関 Mumon no Ikkan (Page 162-163) from the book 忍びと忍術 Shinobi to Ninjutsu by 山口正之 Masayuki Yamaguchi Mumon no Ikkan In the two volumes of the “Shōnin-ki” written three centuries ago,… Read More »History of Ninjutsu: Mumon no Ikkan


