Notification of System Maintenance
Access to our OIH website will be stopped due to system maintenance from 9:00 am to 2:00 pm on Monday, March 30, 2020.
We sincerely apologize for any inconvenience this may cause and thank you for your understanding.
System Maintenance schedule : Monday, March 30, 2020, 9:00 a.m. to 2:00 p.m.
Please note that the time may vary depending on the work.