Nearest station
Maihama Station on the JR Keiyo Line is the gateway to the entire resort. From there, the Disney Resort Liner monorail loops between four resort stations: Resort Gateway (Disneyland), Tokyo Disneyland, Bayside (most partner hotels), and Tokyo DisneySea. ¥260 single ride or ¥660 day pass.
From central Tokyo
The JR Keiyo Line runs direct from Tokyo Station to Maihama in 15-20 minutes (¥230). The Keiyo Line platform is the deepest part of Tokyo Station — allow 10 extra minutes to walk from the Marunouchi side. Trains run roughly every 5-10 minutes.
From the airports
From Narita: Narita Express (60 min, ¥3,070) to Tokyo Station, then Keiyo Line. Or Airport Limousine bus direct to Disney hotels (75-90 min, ¥1,900). From Haneda: Airport Limousine bus direct to Disney hotels (35-45 min, ¥1,000) is the easiest. Trains require two transfers.
Is staying in central Tokyo a mistake?
For a 1-day Disney visit on a wider Tokyo trip, no — Tokyo Station to Maihama is faster than getting across central London. For 2+ Disney days, yes — the daily 60-minute round-trip plus end-of-day fatigue makes resort hotels much better value.