Nobody calls themselves a “Ninja”. Therefore, the image and history of Ninja are vague and filled with mystery. However, in almost every famous war, Ninjas were spoken to have played a big role in the battle. It was Ninja’s flawless sneak missions that led the then-smaller Samurai feudal lords to great victory. In most of the legendary battles in history where the army ran short in number, Ninja would sneak into the enemy's base and cause their army to fail. Sanada Masayuki was the well-known example of the warlords who were also a great coordinator of the Ninja unit. The Sanada clan, despite its army merely being of 2,000 soldiers, has defeated the Tokugawa clan whose soldiers nearly counted 8,000. Ninja Weapon Museum is the place where we exhibit many kinds Ninja's weapons as well as historical weapons such as Samurai swords. It is our mission to share the authentic history of Ninja and ancient Japanese weapons.