It is a style of Japanese swordsmanship.
There are many martial arts that originated in Japan. Judo, Aikido, JuJitsu, Sumo and Iaido are some of them. Karate originated in Okinawa, which is now considered a part of Japan.
Kendo is the japanese martial art of the sword. Iaido is the art of drawing the sword. Kyudo is the art of archery, Yabusame, the art of horseback archery. These were all practiced by samurai. In England knights also trained in ways of the sword, shield, mace, longbow, catapult and other weaponry. Although they had no exotic names, these disciplines are martial arts in the most literal sense.
karate
The ones that I have seen are aikido, kendo and iaido.
A victim.
The martial art that incorporates mainly weapons is called Kobu-Jutsu or Kobudo. Generally you will learn the traditional weapons first learned and mastered by the Okinawan People. Namely being the Bo, Nunchuka, Tonfa, Sai and Kama. These were and still are traditional farming tools in some countries.
It is the sword art, that put an end to the Samurai class of Japan, that's why.
The martial arts you are inquiring about is in fact a more powerfull form inside the iaido martial arts. This is when the proper level has been achieved and now a master teaches only one student. You would have to achieve this level and get a proper master which could turn into something of a quest. You can probably start learning iaido localy before you search for a master in Japan. Then again if you learn iaido localy you can probably get a master for the more powerfull learning.
A newer type of martial art called Keysi (pronounced like Casey)
I found one called Muay Laos
Yes, Judo is a martial art that was based on JuJitsu.
Its not a martial art its a training drill.