Thanks to a personal recommendation, I ended up at a Ringer Hut Premium and had a no noodle champon that didn’t feature on the English menu. Lots of vegetables, and it certainly hit the spot.

The Low Carb movement is definitely gaining momentum as even Yoshinoya has introduced their own lower carb offering
https://mainichi.jp/english/articles...0m/0bu/008000c
I think they call it the Rizap Beef Salad.
My own issue would be the beans as I don’t consider kidney beans or chickpeas (garbanzos) to be low carb, but these should be easy enough to discard.