I think this is an 84, but perhaps an 85, Nishiki
Handcrafted by Kawamura
Make: Nishiki
Model: Riviera
Year: 1984?
Made in Japan
Color: moss green
Serial #:
Speed: 12
Frame size:21"
Frame: Tange 900 Double Butted
Frame type: Lugged
Handlebar: WIN-steel
Handlebar stem: Alloy
Brake levers: Dia Compe-alloy
Brakeset: Dia Compe size pulled-alloy
Shifters: Suntour RV
Derailleurs: Suntour RV
Crankset: Sugino VT-alloy
Pedals: MKS AR-2 Japan-alloy
Pedals Clips: N/A
Hubs: Sansin-alloy
Rims: Araya 27" X 1 1/4"-alloy
Tires: 27" X 1 1/4"
Quick releases: Front & Rear
Seatpost: SPK-alloy
Saddle: Nishiki by Vetta
Kickstand: N/A