Originally Posted by
TOMFORD
Seems like I should be getting a Suica? Am I right in assuming JR rails covers more than non-JR rails and therefore I should get a Suica rather than Pasmo?
No need. ICOCA is fully interoperable with Suica and PASMO so you can use it anywhere Suica and PASMO are accepted. You can also use Suica or PASMO fare machines to add funds to ICOCA.
https://en.wikipedia.org/wiki/ICOCA#Interoperation