- 2021.12.21 Maintenance SuperCon is currently unavailable. MatNavi SuperCon
- 2021.12.14 Maintenance MatNavi service has been resumed. MatNavi
- 2021.12.13 Maintenance MatNavi service is unavailable due to system maintenance. MatNavi
- 2021.11.01 Maintenance Service suspension due to electrical inspection (11/18-24, JST)
- 2021.11.01 Maintenance Service suspension due to system maintenance (11/13-14, JST)
- 2021.11.01 Maintenance Website suspension due to system maintenance (11/13-14, 11/20, JST)
- 2021.09.03 Maintenance DICE service and website will be temporally unavailable (9/6 7:00-9:00, JST)
- 2021.08.25 Maintenance MatNavi service suspension due to system maintenance (8/30 17:40-19:00, JST) MatNavi
- 2021.07.15 Maintenance PoLyInfo is back online MatNavi
- 2021.07.09 Maintenance PoLyInfo is unavailable for system maintenance. MatNavi
- 2021.06.30 Maintenance DICE service and website will be temporally unavailable (7/4 10:00-13:00, JST)
- 2021.05.26 Maintenance DICE service and website will be temporally unavailable (5/29 10:00-12:00, JST)
- 2021.04.26 Maintenance DICE service and website will be temporally unavailable (5/22 10:00-15:00, JST)