I've been to Sukiyabashi Jiro, in Tokyo, four times. The Ginza location twice and the Roppongi Hills location twice. Lunch and dinner service at both locations. These are Michelin 3 and 2 star restaurants, respectively, and it is actually quite challenging to get in to the Ginza location as a foreigner, especially the dinner service. I don't mean to say anything to discredit Jiro or his sons or their apprentices. They are absolutely amazing chefs of the highest quality and they are serving some of the highest quality sushi you can get. It is the best sushi that most people could ever hope to have and the food service itself is worth the experience. But... This place was made famous by Anthony Bourdain and then a documentary.
All of that said, I've personally had sushi that is comparable in quality out in the Japanese coastal countryside at an essentially random michi-no-eki. It's also significantly cheaper and they have pieces of sushi that you won't find in the larger cities that are unique to the region or town.
> If it's just as good for cheaper, then why have you been 4 times?
Because the lunch and dinner services are different. Because we later vacationed in Japan with a couple that we are friends with and they wanted to go and were more comfortable going with us (both of these places are an intense experience, to put it mildly, though one is a more comfortable atmosphere than the other). Because of that intense experience and the atmosphere that it provides.
Because it's more difficult still to comfortably navigate those smaller towns and regions, outside of Tokyo or Osaka or Kyoto, etc..., without any sort of handle on the language. That alone implies a few things. You or someone you're traveling with knows the language well enough to navigate those smaller towns and regions and that it's very likely not your first or even second trip to the country.
We didn't come to understand that sushi in a place like Shimoda could be better than what you'd find at a Michelin rated sushi restaurant until we were able to find ourselves in Shimoda having that sushi and we weren't comfortable even going to a place like Shimoda until our third trip to Japan.
edit/ Because my wife and I are just as vulnerable as everyone else that is being talked about here for falling prey to "top 10 lists" and the like.
All of that said, I've personally had sushi that is comparable in quality out in the Japanese coastal countryside at an essentially random michi-no-eki. It's also significantly cheaper and they have pieces of sushi that you won't find in the larger cities that are unique to the region or town.