Grandmaster James S. Benko, 9th Degree Black Belt and Founder of Han Kuk Mu Ki Do™,
teaches the Korean Long Daggers (Jang Tan-Do).
The jang tan-do (long daggers in English, sai in Japanese) was a Korean farm tool used to help plant crops.
The "blade" of the jang tan-do was dragged through the soil creating a furrow in which seeds were placed
and then covered with soil.
The jang tan-do was used during the Japanese occupation period in the 1500's.
It became a formidable weapon for defense against the Japanese samurai warrior.