Braze on hanger? Nothing particularly too vintage.

Lugs? They look Centurion-ish Though a half-dozen other brands used almost identical lugs on the head tube.

My vote is something 1990-ish, perhaps Ishiwata steel on account of a random unsubstantiated hunch/guess.

My kids JIS/BSA Peugeot looks similar. How goes the seat post diameter? Headset size? 1 inch I presume. Generic Profile Design fork doesn't necessarily say much.

The bottom bracket guides will be the tell.