Just a few small notes: Iwami-soke passed the headmastership of the Hyoho Niten Ichi Ryu to Kajiya Takanori-soke in November, 2013, so the school is no longer "Iwami sensei's group" (of course, Iwami-soke was heading the school when this embu took place). Also, while Musashi-sensei was born in the late 16th Century (around 1584, although there is some dispute as to the exact year), the Hyoho Niten Ichi Ryu, as the culmination of his teachings and experience, dates from the mid-17th Century (circa 1645, when Musashi-sensei died).