Do you know how to read body language?

posture toward the front (/ foward looking /), body position and face the other person. Body language implies the readiness to give attention and warmth. Generally, this body language reflects the positive response to the other person

i have read some books regarding body language.. through body language we can understand if the other person is intrested in what we r saying through the way he sits or stands.. whether he is telling a lie.. we can understand his attitude by the way he gives shake hand.. and lots of things that we need to know.. i suggest you to read some book which has the contents that you wanted to know

Body language varies from culture to culture. SO I would be unable to read it in Japan. :)

I think the eyes of a person can tell you if they are comfortable or not with your company.