The Bansenshukai (Sea of Myriad Rivers Merging) is a multi-volume secret written transmission (densho) of Iga and Koga Ninjutsu. It was compiled by Fujibayashi Yasutake (also, Yasuyoshi) of Iga in the fourth year of En’o (1676). The Bansenshukai collection includes one volume of introduction, question and answer section, and a table of c […] View