In Düsseldorf that’s not the case. The Japanese restaurant are very distinctly less chill than other restaurants. Like, where you’d usually spend 3 hours in a normal restaurant, it is kinda expected that you eat and leave a Ramen shop within an hour.
Isn’t ramen in Japan fast-food? Of the people who dine-in, few people would stay at a McDonalds an hour to “dine”. It’s go in order, eat and get out.
And, like burgers you do have high end joints too.
Also, like burgers ramen isn’t considered “healthy” food. High sodium, high fat, and somewhat low in nutrients. It’s basically fast-food.