Bethany, as far as decor goes you missed a rather large and lovely portrait of Wham, an Andre the Giant t-shirt, as well as a beautifully painted Steven Seagal movie poster-- which sure, isn't a lot in sheer 80s volume but is surely substantial in content.
The Showa era officially began in 1926 and went until 1989.
I'm picturing the pub/bar where Ralph Machio busted up chunks of ice in Karate Kid 2 !!