What are the most common languages spoken in Tokyo?

In Tokyo, there are many unspoken social rules. Public transportation is used by the majority of people here and buses and trains are often crowded. When riding one of these forms of transportation, there are many of these social rules to be careful of. First, you should not speak too loudly. Even when the train is crowded, people are usually quiet. In addition to this, it is rude to speak on the phone on public transportation. It is also not appropriate to eat or drink while on a bus or train. While none of these actions are, in fact, prohibited, they are looked down on by most people here.