It all started in the late 2000s, when a number of Japanese railway companies began installing blue lamps above train station platforms. It was an attempt to deter people from suicide in such places – a so-called “nudge” technique.
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While you may be accustomed to chatting with your traveling companions while using public transportation, this is not the norm in Japan. Loud chatter or other disturbance is considered rude. You may notice that most Japanese train passengers stand or sit in silence. If you must converse, try to do so quietly.
While on the train, your phone should be on silent mode and you should avoid making or receiving phone calls. Keep conversations to a minimum. Much like phone etiquette, if you are riding with friends, family, or coworkers, you can typically talk but do so quietly. Don't eat or drink.
Traffic lightsA red light always means ?stop? If the light facing you is red, stop and wait for it to turn green. Follow the green arrow. If the light facing you is red, you must stop and wait for a green light. However, if you have a green arrow, you can turn only in the direction indicated by the arrow.
There's also no cultural relevance that prohibits people from eating while walking. As long as you are following TPO guidelines, you should be good. While it's okay to eat while eating, it's not a common practice. Japanese people are mindful of having cleanliness and respect for public spaces.