While there are prominent Martial Arts figures (such as Miyamoto Musashi) who have been credited with using bokken in combat, there are no specific styles that utilize this weapon as its primary source. This is not to be confused with a Shinai, which is a sword made of flexible stripes of bamboo, used mainly in Kendo.
Bokken are used by many martial arts, such as Kendo, Kenjutsu, Aikido, or in schools where a safer method of instruction is sought. Bokken are generally shaped like a katana, though there are wakisashi and tanto versions available. These blades help students practice sword techniques while providing more safety than would be available from actual blades.
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.
karate
A collection of weapons is an arsenal.
The UFC
Dojang is the common name used to describe a Korean martial arts training hall / school.
It is called "obi". In English, it may also be referred to as "obi sash" or "kimono sash".
It is a style of Japanese swordsmanship.
A master
han wudi
Court Martial
A victim.
A Military Courts-Martial.