+1, a Fuji would be my leading candidate, as they used forged dropouts with provisions for adjusters. Almost everyone else used flat plate. The subject bicycle also has the little peak cut into the front of the seat tube, that was typical of Fuji. Serial number indicates a 1989-1990 model. It looks like the non-drive side crankarm may have a crack in the reinforcing collar on the back of the arm.
It's definitely not a Miyata, as their titanium frames of this era were bonded with aluminum lugs. When you think Yellow Jersey of this period, you think Panasonic, but during this period they had vertical rear dropouts cut from plate and the cinch bolt for the seat post was integrated into the fastback stays.