I stayed in Nagoya for a total of 3 days. If you are going to Nagoya for a holiday as well, you should visit the famous Nagoya Castle. I spent about 2.5 hours here, taking photos and looking through the exhibits.
Another place that I would highly recommend is the Toyota Commemorative Museum of Industry and Technology. This museum showcases the journey of the company from textile-making to producing cars and high-tech products. The museum's staff would also be doing live demonstrations with the various machinery, so that visitors can better understand how the machine works and the brilliance behind them. As I'm not from an engineering background, I find this visit very educational. The exhibits also narrate the journey of the company and the struggles, which is inspiring not just from a business-building perspective but also provide guiding beacons for life in general too. I would say both children and adults would find a visit to this museum fun and rewarding!
If you are visiting Nagoya with children, do make a trip to the SCMAGLEV and Railway Park. Visitors would be able to learn about the history and future of train technology, and be inspired by the hard work that goes behind keeping the trains working as well as pushing the next frontier of train speed and comfort. There is a train driving simulator area where children can try to operate trains themselves using the steering wheels and gears!
When in Nagoya, I did not select the room package that included breakfast. I got my breakfast in various cafes or just simply bought bread from bakeries, which was a cheaper and more interesting option.
For me, the most value-for-money breakfast place was Chapeau Blanc (located in the underground shopping mall area of Nagoya Station). For less than $7 per person, you get either a cup of coffee or tea, and then you can eat all you want from their spread of different bread and pastries. The hard boiled eggs are free flow too!
Another breakfast place I went to was Komeda's Coffee. There are a few outlets and I went to the one nearest to my hotel. I find the bread here is nicer than Chapeau Blanc's, but smoking is allowed inside the shop and you may want to give this place a miss if you want to stay away from second-hand smoke.
If you need to catch an early flight out of Nagoya, you can consider getting breakfast at Doutor Coffee. They open early and have a few outlets too, and I had breakfast at the one within the underground shopping mall area of Nagoya Station.
According to online recommendations, miso udon is a dish to try when in Nagoya. Therefore, I had some miso udon at Yamamotoya Honten (near Nagoya Station and in the basement of a building). The restaurant has English menu and you should tell the waitress that you want the egg to be boiled if you don't wish to have a raw egg over your udon. When I was there, the restaurant was 80% full even before lunch time and most customers were Japanese. Although the food was delicious, I find the amount of meat was too little for the price I paid (about $20).
I also tried grilled eel at the famous Atsuta Horaiken. When we reached there at around 5.30pm, it was full-house and we could only make a reservation for 7.30pm or later. We put down our name and then took a walk around the neighbourhood. It is a residential area with nothing much to see, but we were lucky to chance upon a small park beside a river, where we could sit and enjoy the scenery and wind. While this meal was expensive, the eel was fresh and nicely grilled. Taking into consideration the need to travel to this place from Nagoya Station, as well as the waiting time and price, I guess it would not be a bad idea to try Nagoya's grilled eel at other restaurants near to Nagoya Station too.
If you are planning a trip to Nagoya, I hope the above information would be of some help!