List of Japanese App Based Consumer Payment Systems:
1. PayPay (Yahoo, Softbank, PayTM)
2. Line Pay (Line)
3. Rakuten Pay (Rakuten)
4. Origami (Origami)
5. Amazon Pay (Amazon, online)
6. Merpay (Mercari, )
7. PixivPay
8. Au Pay (Au)
9. D barai (Docomo)
10. &Pay (MTI)
11. Pring (MetaApps Inc)
12. Pay ID (Base Inc)
13. PayB (Billing System)
14. Yoka! Pay (Fukuoka Bank)
15. HamaPay (Yokohama Bank)
16. MoneyTap (Ripple)
17. Lawson Pay (Lawson)
18. Famipay (Famipay)
19. 7Pay (7 Eleven)
20. Wechat
21. Alipay
Hoshikawa-san from Crowdcast has a very good map of payment players in Japan:
https://medium.com/@t.hoshikawa/国内キャッシュレス-カオスマップ-2019年1月版-c7641bef2b1d
