System maintenance notice on May, 2022

System maintenance on our service is scheduled as follows. During the maintenance period, our service will not be available. We apologize for any inconvenience caused.

Maintenance period:
from 10:00 a.m. to 6:00 p.m. on Sunday May 29, 2022, JST

Future maintenance plan 

Sunday June 26, 2022

Sunday July 24, 2022