System maintenance notice on May, 2021

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 23, 2021, JST

Future maintenance plan 

Sunday June 20, 2021

Sunday July 18, 2021