GLOSSARY
Since a lot of what's said in the dojo is in Japanese it's useful to have a clue what it all means.
Here are some words.  For a huge dictionary of every jitsu-related word you could ever want to know go here.
SENSEI- instructor/teacher 
REI- bow 
TATAMI- mat 
DOJO- training hall
OBE- belt
GI- suit
UKEMI- breakfall 
YAME- stop 
YOI- get ready 
MATTE- wait 
HAJIME- start
JIU- gentle/compliant
JITSU- practical techniques
AI- harmony
UKE- partner - "throwee"
TORI- partner - "thrower"
ATEMI- striking
GERI- kick
O- major
KO- minor
GARI- reap
GAKE- hook
NAGE- throw
WAZA- technique
GOSHI/KOSHI- hip
ASHI- leg/ ankle
HIZA- knee
YOKO- side
USHIRO- rear
MAE- front