Strange Customs & Manners in Japan

Some manners Japanese are used to are found quite strange to foreigners. "Why see people off until they are out of sight?", "Why can't we sit cross legged?", "Why can't we drink before a toast is made?", "Why can't we talk on cell phones on trains and buses?". Foreign guests will discuss over the differences in manners compared to their countries. Will such Japanese manners gain understanding from foreigners?