A mystery. My bets are Nishiki or Takara, but can find no proof. What I have is:
Lugged Champion No.5 PG frame with three bottle mounts, and full rack mounts F/R and threaded fender mounts in rear, no chrome
Diacomp 981 brakes
Suntour ARX derailuers with top of the down tube mount shifters
Std. SR stem/rando bars
Serial # HE87496
Cream color with burgundy head tube
Forged Suntour dropouts
Sugino GT triple cranks
Suzue LF 36H hubs laced to Araya non-hoked bead alloy rims, 5-speed suntour freewheel
No stickers at all (or sign it ever had any).
Suntour derailuers are date coded ZC (1983 vintage) and the brakes are 5583 (1983).
It is a darn nice 1984ish bike sans the PG tubes.
I am beginning to wonder if it is a custom of some sort. The rack bosses on the seat stays are way out of alignment (5th photo) the right is toed 10 degrees in, the left is 10-degrees toed-out; almost like they put them on the wrong side.