After clicking "Approve AWS Connection", the error message(Service Unavailable: Not in Ins Time) appears.
You might click "Approve AWS Connection" outside the reception hours of this menu(9: 30 - 17: 30 Japan Time on Weekdays). Please try it again during the reception hours.
Service Descriptions - Amazon Web Services Inter-Connectivity - Important Things to Note when Ordering
The reception hours for this Service Menu is 9: 30 - 17: 30 Japan Time on Weekdays.