モバイルSuica -いつものSuicaがアプリで便利に- is a finance app by 東日本旅客鉄道株式会社 with 10,000,000+ downloads (about 11M estimated). +42K installs in the last 7 days. Rated 1.8 from 35K ratings. Install growth, rank history, SDKs and ad networks.
From the store listing: “Suica's app service that allows you to charge with a credit card anywhere. You can use it for trains, buses, taxis, and shopping at Suica stores nationwide.”