Originally Posted by RichardInSF

Nope, for starters, it will take you 15 minutes the first time you get off at Tokyo station just to FIND the taxi queue. Plus the odds are 50-50 you will find the wrong one, leading to a longer trip. And if Google says it is only a 5 minute longer drive than from Shibuya, then I would stop using Google estimates in Tokyo. It just isn't true.

At Shibuya station, from where the N'Ex drops you off, to get to the nearest place you can hail a taxi take any exit going down, not up. Get off at street level. Done, sorted.