Hunky-Dory

The story is that it came from a street named "Honki-Dori" (or Huncho-dori) in Yokohama, Japan. Since the inhabitants of this street catered to the pleasures of sailors, it is said the street's name became synonymous for anything that is enjoyable.

The problem is that the term came from a song that became popular during the US Civil War and 

"Japan was not opened to foreign ships until Commodore Perry's visit in 1854.

It seems somewhat doubtful that the Yokohama theory holds water. More likely, hunky-dory was already a slang term when American sailors first had shore leave to Huncho-dori Street."

http://www.straightdope.com/columns/read/1495/whats-the-origin-of-hunky-dory