Just a heads-up for future cruisers regarding the welcome suica card, if, as we did, you get these in advance of arrival in Japan, it's worth activating these at JR counters at the airport otherwise if you get a transfer direct to your hotel in Yokohama, as we did you'll need to get to the nearest JR station (Yokohama) to do this, then you can re-load these up at any 7/11
Alternatively use e-suica if you have an i-phone