A nice list of Japanese shows to watch on Netflix to help improve your Japanese. I wholeheartedly agree with the choice of Midnight Diner. That would be my top pick. Even if your goal isn’t to learn or improve your Japanese, the show is a delightful look into Japanese culture.
I’ll also add one not listed: Aggretsuko. It is an anime, which might be off-putting to some, but give it a chance. It is a great look at what goes on in Japanese offices. What they show is exaggerated for comic effect, but it is based on what you will really find if you work for a Japanese company. Plus, it’s very funny.