4 Facts About Ninja

1. Ninja utilized a large variety of tools and weaponry, some of which were commonly known, but others were more specialized.

2. Ninja were stealth soldiers and mercenaries hired mostly by daimyos.

3. Ninja emerged as mercenaries in the 15th century, where they were recruited as spies, raiders, arsonists and even terrorists.

4. Ninja is an on'yomi reading of the two kanji "忍者".