One of my favorite restaurants, and it is a chain, is Ootoya. Just good tasting healthy various Japanese dishes. Good variety with all kinds of meats and also vegetarian options. No sushi and not an izakaya.
I’m guessing maybe 20 branches in Northern Taiwan.
One side tip when in Japan, they are all over and have English menus so easy to get a good meal. The ones in Japan also have other perks like unlimited drinks or unlimited coffee or open 24 hours.