tribes and races

Most of Japanese can't explane about tribes and races well because there aren't any tribes and races in Japan. Japan is made of some islands, so the number of other tribes and races which lives in Japan isn't so large. Although tribes and races stand for same meaning, I think that races are bigger category than tribes. I heard tribes and races were important in other countries, this isn't meaningful. People is people, I think. If you meet person of other tribe and race, you should not distriminate them. Moreover, you should cherish thier own cultures.