The Japanese school day begins with everyone going to their classroom, often they do some studying and chatting, then the bell rings, then the sensei comes in, calls register. The class reps read out notices then there is usually a 10 minute homeroom study period (some talking allowed), then first lesson begins.<br/><br/>Now if we are all in one class all of that time can be used for character interaction. If we are in different classes - we can't interact except maybe at lunch break and after school hours or in the school clubs. Or in the halls/dorms.