Company as "Tribes"

Yusaku's post lead me to think how the Japanese view "tribes". Unlike America, Japan is a homogeneous society so the concept of tribes must have a whole different meaning. If I recall correctly loyalty to one's company is a traditional Japanese aspect. In Yusaku's case it may show how loyal a Japanese person is to their company, considering it as their tribe. I think I also heard something about how the Japanese tend to want to become a part of a unique "tribe", and that is why they see joy in finding a particular difference from one another, for example the blood type horoscopes. In a heterogeneous culture, their blood type maybe the last place a person looks for difference, but in Japan, it is one of the few physical differences among one another. Maybe this is also the reason why we see a lot of radical fashions in some places like Harajuku, to feel like they belong in a unique tribe.