An extremely busy station - can be a bit intimidating at first trying to get arguing (especially in the rush hour) but friendly staff are always at hand to help :)
The train system in Tokyo is extensive... But confusing. There are three major suppliers of transport, so if you can't find the right stop, it's probably because you need three different maps.
Be prepared here and keep it movin’! If you’re not sure where to go, hug a wall until you figure it out. Don’t stand idle in the middle of people walking, it’s rude.