KOKA, Shiga Prefecture--Like the furtive ninja groups it hosted in feudal times, this city in western Japan still has secrets to spill. In this latest instance, researchers discovered the first ...

He discusses the realism of ninjutsu training and skills in "Revenge of the Ninja" (1983) and "Ninja Assassin" (2009). Kawakami is the last heir of the Ban clan of Kōka-Ryū Ninjutsu. He is also ...