dogi -- white pants and jacket used as training gear by aikido, judo and karate practitioners
dojo-cho -- leader of a martial art school
goshujin sama -- honored husband, honored lord/master
hakama -- black and flowing traditional trouser worn by aikido practitioners who hold a 'dan' rank (black belt)
kohai -- practitioner holding a lower rank than yourself
kyu -- grade conferred to Japanese martial arts practitioners before they achieved the first 'dan' rank
mudansha -- practitioner of a traditional Japanese martial arts who doesn't hold a 'dan' rank yet (black belt)
neko -- cat
oku sama -- honored wife
seiza -- Japanese traditional way of sitting on your knees and ankles
sempai -- practitioner holding a higher rank than yourself
shintoism -- the main, traditional religion of Japan, along with Buddhism. Shintoism is an animistic religion: everything (including non-animated objects such as wind, swords or stones) has a spirit.
shodan -- first black belt rank
tatami -- straw mats used in dojo and in rooms inside Japanese houses
ukemi -- rolling, falling queen_of_sass
uke -- attacker and recipient of a martial art technique