It goes (bare with me here) ding ding-ah ding... ding ding ding, usually followed by a gong or cymbals.
...and if you know where I can get an mpeg or soundfile, that would be helpful.
Not Chopsticks....you hear it in chinese or japenese films, especially the karate ones that are dubbed over.
maybe an extra ding is needed....

ding ding-ah ding ding...ding ding ding,
The Vapors played the same tune at the begginning of their song "Turning Japanese"

http://www.amazon.com/gp/music/wma-pop-up/B0000074RG001001/ref=mu_sam_wma_001_001

Listen to this, the tune is at about 12 seconds.