As reported Impress Watch (https://www.watch.impress.co.jp/docs/news/1511685.html), starting today (6/27 Japan Time) you can add ICOCA to your iPhone/Apple Watch, similar to Suica/PASMO. Probably not that useful for the majority of visitors already have either Suica or PASMO on their iPhones/watches, but for those wanting to have more than 20k man (or 40k man between Suica/PASMO) at any given time, then you now have another choice, or if you prefer the design of ICOCA to Sucia/PASMO.