In any case, the theory in "Koyo Gunkan" (record of the military exploits of the Takeda family, compiled by one of the Takeda vassals, and completed in 1616 by Kagenori OBATA) that claims that Nagasaka and Atobe escaped violates a historical fact).
いずれにしても『甲陽軍鑑』が記載の長坂・跡部逃亡説は史実に反する）。