Rare, old Ninja oath uncovered

– Japanese researchers have uncovered a rare, centuries-old Ninja oath pledging never to divulge the secrets of their spying and sabotage skills.

Written in cursive calligraphy, the oath contains six promises and was signed some 300 years ago by “Inosuke Kizu”, a Ninja from a clan in Iga, a town near the ancient imperial capital of Kyoto.

The document shows how strict Ninjas were about keeping their skills and techniques secret. – Reuters