Japanese are said to be polite. But sometimes it strange countries and cultures have different common sense in the Japanese. When I rode the elevator and when you are walking down the street, Japanese can not write a voice to people who do not know. The pictures were taken with the blunt, or is thought to be dangerous sometimes abroad. Japanese have been taught to be heard in silence the story of people. So there is also that it would have been thought whether not interested to talk. I will verify the courtesy on the theme greeting, conversation, grooming, four of the meal.