Etiquette

When entering or leaving the dojo, it is proper etiquette to bow in the direction of O Sensei's picture.
You should also bow when entering or leaving the mat.
If you arrive late for a class then simply sit on the edge of the mat until the teacher is aware you're there.
If you need to leave the lesson for any reason then please let the teacher know.
Remove watches, rings and other jewellery before practice as they may catch your hair, skin, or clothing and cause injury to yourself or your partner.
Please keep your fingernails (and especially your toenails) clean and cut short.
Keep your training uniform clean, pressed, in good condition and free from offensive odours.
Please keep talking during class to a minimum. What conversation there is should be restricted to Aikido. It is impolite to talk whilst the instructor is addressing the class.
It is usually considered polite to sit in seiza (knelt down) and to bow upon receiving assistance or correction from the teacher.
Whoever is teaching is referred to as sensei only whilst they're teaching, if you are speaking to a Japanese teacher on or off the mat then you should always use the term sensei when addressing them.