Originally Posted by
Kallio
Never had any problems finding a correct platform in either of them. However I've had some challenges finding correct exit in Shinjuku station. Nothing major though and only way to avoid those is not to go to Shinjuku at all.
Of course, arriving at Shinjuku or Shibuya stations requires some preplanning. I took the Tokyo Atlas Guide: A Bilingual Guide with me. It has all the exits numbered and listed for each of the stations on the map. Again, each of the exits at the stations have exit numbers, making it easier to find your way out.
It will be intimidating for the first time traveller arriving without any preplanning.