their will be many japanese or chinese words in the campaigns, first because Exalted is a manga-roleplaying game, second, because the Realm is designed to be a mixture of these two cultures, so, do not be afraid.
there are few words explained:
katana: japanese sword (like you can see in many animes and movies)
wakisashi: small japanese sword
daisho: katana+wakisashi, symbol of the samourai caste
torii: spirit gate, three elements (japanese spirituality loves the 3 as our culture), it is a gate which marks the limit between our world and the spirit world, walking through a torii, someone should clap hands three times to attract the spirits
kimono: traditional japanese robe, the commoners had cotton kimonos, rich people used to have silken ones
judo-gi: fighting suit
mon: circular symbol usually put on the back of any clothes, the mon gives an idea of who is the bearer and his family