Ninja Hokode (Illustration) - World History Encyclopedia

Ninja hokode or hand claws, used for climbing and as a weapon.

An Overview of Eastern Medieval Weapons - Total War: Shogun 2 Heaven Forum

The History of Japanese Ninjas

Ninja - World History Encyclopedia

Ninja - Uncyclopedia, the content-free encyclopedia

The Real History of the Ninja - World History Encyclopedia

16 Things You Didn't Know About the Origins of Ninjas

Ninja: Shadows of Medieval Japan

Ninja History: Frequently Asked Questions from Japan

History of Ninja in Japan + Ninja Cartoons

What is a ninja? Explaining the origins, roles, and types of ninja, Introducing ninja experience events in Mie Prefecture!, Interview report