What I know:
Canadian Nishiki serial CH0 3434 which I think makes it 1988
almost all Exage components
7 speed cassette (i'm assuming freehum but not checked), friction not SIS
chips and bits of rust but nothing that worries me
Very little clearance (4-5mm on 25c tires)
weighs around 10 or 11kg (22-24lb?)
I've never seen a nishiki in the UK
Spend up to £400 making it into the best commuter bike ever.
I'm probably going to make it into a flat bar/ bullhorn bike, I just don't really get on with drops that well to use them every day.