Regarding the issue of schedules being automatically registered
Even before making a reservation, the "Reservation" message appears automatically on your mobile device, and your schedule is automatically added to your calendar. Please rest assured that simply viewing the home page will not result in a reservation.

When making a reservation, you must enter the date, number of people, menu item, and reservation information. A "Reservation ID" will be issued once the reservation is complete. Please see below for workarounds.

TableCheck - Diners Help Center:
https://support-diners.tablecheck.com/hc/ja/articles/4415642705945

This restaurant has established terms of use.
Please see below for details.
Restaurant Terms of Use