The CreditCard no Yomimono site (CCY) has collected and listed all the FeliCa contactless card issued to date numbers released by Japanese companies in 2018 into one convenient table. WAON is missing because AEON didn’t release any numbers this year, CCY estimates WAON card numbers at 70 million . The numbers are fairly recent and roughly inline with the Japanese fiscal year through early 2018. They are very interesting but as CCY points out the number of issued cards does not always translate into actual use: previous surveys indicate that Rakuten Edy is used much less frequently than Suica at the cash register.
Prepaid Transit IC cards (Suica, PASMO, etc.) are by far the largest at 143,700,000 which means that every person in Japan has at least one. CCY also notes the explosive 51% growth rate of QUICPay which they attribute to Apple Pay. This is one half of the story. JCB has certainly done an excellent job of working with Apple Pay but I suspect another reason is that Japanese Apple Pay Suica users switched from using Japanese issue VISA cards that don’t support Apple Pay Suica recharge in favor of QUICPay cards like JCB VIEW that do.
Any way you look at the numbers one thing is clear: prepaid cards are far more popular than credit cards for contactless payments in Japan. The huge installed base of Transit IC cards also bodes well for the Super Suica card that will integrate them into a single format for plastic issue and mobile hosting in early 2021.