The trick is to get a Suica card, which as an foreigner you need to do at the airport train station before you leave to the rest of Japan.
https://www.jreast.co.jp/en/multi/welcomesuica/purchase.html
https://www.jreast.co.jp/en/multi/welcomesuica/purchase.html
If you go down the "add a pasmo/suica on your phone" then you get into licensing issues with the other cabal (credit card issuers): you need to use an Amex to charge it via Apple Pay (IIRC Visa is now supported, but when I tried it last week my card was declined, so... YMMV).
Same experience with reloading on the physical machines. It’s quite amusing
The only real differences between the Welcome Suica and a regular one are the 500 yen deposit (Welcome Suica doesn't require a deposit) and the limited validity (Welcome Suica automatically expires after about a month).