The start time of order acceptance on day session is 8:00 JST, and the start time of order acceptance and beginning of session in J-NET is 8:20 JST.
For details, please refer to "5.1(1)_Time Table Involving Each Product Categorization" and "5.1(2)_Timetable by Category" on [J-GATE3.0_Connectivity_Manual_Commonalities_part_Appendix].