About once a month, we hold something like concert. I will describe cohesiveness of any Japanese group. Especially Japanese women act in concert with some friends. I think Japanese people may depend on others, have lack of the spirit of independence, feel uneasy without anyone together. But it also has a good point.
Japanese people respect for other's opinion, are considerate of people who are in same group.
Sometimes people understand each other without speaking. People look at others and imagine their thoughts, feelings, intentions, wishes, expectations and so on. If the imagination was correct, there is no problem. A relationship will do well. But if the imagination was wrong, it causes misunderstanding.