Take the Tokyo Metro Tozai Line from Koto to Kasai or Urayasu area, then transfer to the JR Keiyo Line or Disney Resort Line to Tokyo DisneySea
Take the JR Keiyo Line from the nearest JR station in Koto to Maihama Station, then take the Disney Resort Line to Tokyo DisneySea
Take a taxi or rideshare directly from Koto to Tokyo DisneySea
Use a highway bus or shuttle if available from your area in Koto to Tokyo DisneySea
Check the nearest station in Koto and choose the fastest route to Maihama Station using a transit app