Yes, you can use the Shinkansen e-Ticket Service, Touch de Go! Shinkansen, and discount passes on the same Welcome Suica Mobile app. To transfer between the Shinkansen and regular lines, touch your device at the Shinkansen transfer gate.

[Please note] For customers transferring from the Tokaido Shinkansen to JR East's regular lines:
If the discount pass is being used for the first time, you cannot transfer directly at the transfer gate. Please exit the Shinkansen gate and re-enter through the regular train ticket gate.