Ninja Blade is an action adventure game set within modern day Tokyo. Parasites known as alpha-worms have mysteriously appeared, unleashing a wave of human destruction as they rapidly spread east, reaching the shores of Tokyo. With the future of humankind hanging in the balance, an exclusive and elite team possessing highly specialized skills is formed to eliminate the enemy onslaught, and ultimately save mankind from complete obliteration.

A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja.

A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja.

A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja