Originally Posted by
jib71
I agree. It's a disservice to call it Tokyo station. Recommended transfer time from JR to Keiyō Line is 20 minutes. The Keiyō Line is closer to Yurakucho station than it is to the JR lines at Tokyo station.My preference would be to skip the Tokyo station area altogether and ride the Yurakucho line to Shin-Kiba.
The part about continuing on from Tokyo Disney was my clue that this was the Costco in the Makuhari area.
Having repeatedly wheeled an infant in a pushchair from central Tokyo to Maihama, I can confirm that the Yurakucho line to Shin-Kiba route is (from my perspective) the easiest route (Nagatacho station gives a step-free transfer from the Namboku line)