The need for a reservation is very serious in Japan. Slightly good restaurant is always full in the dinner time. Reservation at a very good restaurant usually take weeks, months, years beforehand. Some of them is introduction-only. You can’t even get in, walk in is nearly impossible.
A reservation here means commitment. Commitment that you’ll show up 15 minutes before. A commitment of full payment for no show. A commitment of your phone number, a no show no contact may result in your phone number in the deny list of restaurant network.
Some good restaurants you have to pay part of the meal or at full price beforehand. A lot of good places you would need to book 3+ month ahead with a commitment that you will definitely go there.
What kind of services you can use visiting Japan?
If you know someone already going there, ask them to bring you as plus one if they would.
If you stay at a 5 star hotels, they can usually reserve restaurants for you on your behalf.
Top luxury restaurants. https://omakase.in/premium
¥4980 per month.
Top restaurants. Owned by AMEX.
You can reserve The God of Tempura: みかわ 是山居 on this platform.
You need to be a Resident in Japan and premium member of Tabelog ¥500 per month.
You need to be a Resident in Japan.
Another choice to find some restaurants.
Some restaurant only takes phone reservation.
You need to have a Japanese Phone number and Japanese skills.
Bid a seat for famous restaurants, seat at Sushi Saito is ¥200,000.
https://shokuoku.com/restaurant/info1.php
https://yoyaku.toreta.in/torisaki
They charge $50 USD per booking.
They dont get you anything. Don’t use it. It only causes troubles for the restaurant.