Japan ETFs
  
See: Exchange-Traded Fund (ETF).
Comprising this ETF would be shares in Japan-centric companies like SONY, Sumitomo Bank, Toyota, Softbank, and a bunch of others who rose impressively from the ashes of WW2, The Big One, to (at one point in the 1980s) seem like they were poised to rule the world.
And hi, SONY, we're lookin' at you. You shoulda been Apple.