Apologize in Japan

あやまり
When Japanese people apologize, they consider it best to simply bow their head and say, “I am sorry” rather than adding any explanatory defense for what they have done, because they feel that any such defense means that you do not recognize that you are at fault. The best apology is expressed in the least possible number of words, with the head bowed as low as possible, and with a look of contrition on the face.