Welcome Suica Mobile is available at all times unless otherwise specified. However, the following operations are unavailable at their given times for system maintenance. 
[Suspended times]
*All times are in Japan Standard Time. 
· Registering to use the Welcome Suica Mobile app: 2:00 a.m. to 4:00 a.m.
· Suica top-up: 2:00 a.m. to 4:00 a.m.
· Displaying usage history: 12:50 a.m. to 5:00 a.m.
· Changing/replacing devices: 2:00 a.m. to 4:00 a.m.
· Purchasing discount passes: 11:45 p.m. to 4:00 a.m.
· Refunding discount passes: 11:45 p.m. to 5:00 a.m.

[Temporary System Maintenance Notice]
We will be performing temporary system maintenance during the following period.
During this time, services that require app operations—such as charging—will be unavailable.
★ You can still use any SF balance you have already charged. Please touch your device to the ticket gate or reader as usual.

February 25 (Wed), 12:00 a.m. – 4:30 a.m. (JST)

[How to Use Services During the Maintenance Period]
- Charging via the app will not be available. Please charge your balance with cash at convenience stores or charging machines located in stations.
- Passes cannot be purchased. Please use a ticket machine to buy a paper ticket.