Thirty-one open by eight
Among the shops whose hours we could structure, 31 open by 08:00. Push it to 07:00 and only five remain.
Nagoya is known as the morning city, so people assume plenty is open early. In practice only a narrow set trades in the morning. Without aiming for it, breakfast will be your hotel or a convenience store.
Half of them serve miso-nikomi udon
Here is the surprise: of those 31, 16 are miso-nikomi udon shops and 7 are kissaten. Two ramen, two yoshoku, a handful of others.
In the city of the free breakfast, half of what opens early is clay-pot udon. The reason is format — the larger all-day shops, chains included, run straight through from morning. Eating a simmered udon at breakfast is a genuinely realistic option here.
For the morning set, still go to a kissaten
The morning service — toast and a boiled egg for the price of a coffee — is kissaten culture. That figure of seven counts kissaten open by eight, not the number serving morning sets.
This site lists 33 kissaten and most open between eight and nine. Morning service usually ends around eleven, so plan on arriving at nine and leaving at ten.
The five that open by seven are all chains
The five opening by 07:00 are branches of Ramen Yamaokaya and Sagami. Both are suburban chains built around early or around-the-clock trading.
No independent shop in this list opens at seven. If you need to eat at dawn, the honest answer is a chain, your hotel, or a convenience store.
Building a day that starts early
For a first shinkansen or an early start sightseeing, the order runs: 07:00 convenience store or hotel; 08:00 onward a kissaten morning set; morning service ends around eleven, so move to lunch from there.
Centrair airport is the exception — kishimen and coffee shops open there from seven. On the day of an early flight, eating at the airport is the reliable move.
How to read these numbers
Opening hours are structured from listings and could not be parsed for every shop. A missing shop is undetermined, not closed in the morning.
Hours also shift on Sundays and public holidays. If one place is the reason you are getting up early, confirm the day before via the official site or phone number on its shop page.