In any case, knowledge does go a long way.
When we recently went to Tokyo, we noticed that the trains and subways were very quiet, there are signs everywhere with a phone and an X on top of them. No talking aloud on the train. However, when we were in Osaka, the trains were bustling with conversations with noise of beer cans being opened. A stranger even spoke to us in English, while his colleagues laughed and cheered him on. We are still not sure if the "no talking on the train" mandate is regional or just a suggestion.
To discover more of these unexpected missteps, BBC recently sought out the advice of users on question and answer site Quora, asking “What should I absolutely not do when visiting your country?” See the etiquette rules that surprised them the most here.
Do you know of any etiquette that foreigners should know when visiting your country?