I’m not talking about the “typical” junk food (like KFC or McDonalds), instead it’s more on certain aspects of Japanese cuisine being carb heavy or features fried items such as: ramen, agepan, karage, tempura, gyudon, tonkatsu, yakitori, etc. I mean, can ramen or gyudon bowls still be deemed “fast food” even though they appear ‘healthier’ than American fast food.
It’s absolutely fast food, just like konbini or super bentos. I guess some of those would be called “fast service” in US terms, but Yoshinoya, Matsuya, and the like are fast food.