We had tried to ask our hotel to help us with the reservations, but they were unable to, due to some reservations policy. Nonetheless, we decided to try our luck walking in. Turned out that we were the very first customers at 12 noon when we arrived.
There were 3 lunch menu, and the difference between the ¥8,000 and ¥6,000 menu was an additional main dish of grilled wagyu beef. We didn’t get to see what was in the ¥15,000 menu, but anyway we opted for the ¥6,000 one, knowing that we would be eating lots during the trip 😅