HIPMATE is an entertainment system which business persons can play in the office in spare time. Users can enjoy themselves as they feel with touching each other by playing HIPMATE. HIPMATE consists of 3 chairs (we call them "HipBall") and a panel (we call it "HipPannel"). HipBall and HipPannel put in separated areas in the office. When a user sits on a Hipball, his/her buttocks are projected to the panel forming the buttocks. And another user can knead the panel. As a user kneads it, the buttocks of sitting user are appeared. On the other hands, the sitting user can see another user kneading his/her buttocks through a display. And the user can see the kneading user's face by touching the display. Users can enjoy the game using a diplomacy that is produced from emotional two needs. One need is touching other's buttocks, and another is trying to see the kneading person's face. By playing HIPMATE, users can get a feeling which he/she usually must not touch the others' body parts. And users can get on initiate terms through touching body parts. HIPMATE can help people to be in body communication with other people and we would like to make use of a new body communication from HIPMATE in the office.