When you use a Suica card with Apple Pay, your balance is recoverable, even if you lose your device. When a Suica card is removed from any device, the remaining balance is stored and remains available to re-add to Apple Pay on another eligible device that is signed in to iCloud with the same Apple ID. If your device is offline, your Suica cards will be suspended from use by midnight. You can also call your card issuer or Suica Support (050-2016-5005) to suspend or remove your cards from Apple Pay. You can add your Suica cards back to Apple Pay after 5:00 a.m.
https://support.apple.com/en-hk/HT201469