Are there restrictions on the regular tickets used with the discount tickets (limited express tickets) booked on the JR WEST ONLINE TRAIN RESERVATION website?

With the exception of some tickets, you cannot use regular tickets with group or charter train car tickets.
In addition, you cannot use them together with a commuter pass.
※ You cannot use Special Package Tickets, such as the 18 Year Old Youth Tickets that have restrictions to ride on the Limited Express Train.
Meanwhile, there are also products such as the JR-WEST RAIL PASS that combine the Limited Express Ticket and the regular ticket as a set package.