Any Asian neighborhood in DC?

There really aren't any left in DC proper; most Asian communities are out in the suburbs. Many Koreans are in Annandale, VA. http://en.wikipedia.org/wiki/Koreatown#Annandale.2C_Virginia

Seven Corners has a lot of Vietnamese: http://en.wikipedia.org/wiki/Little_Saigon#Virginia

Rockville MD has a lot of Chinese: http://en.wikipedia.org/wiki/Rockville,_Maryland#Demographics

There are quite a few areas of D.C. where Asians tend to gather, but Chinatown is shrinking dramatically and is not as safe as it once was, especially after dark.

If you have options, see what you think of Rockville or Bethesda, in the Maryland suburbs. Both have pockets of Asian residents. Takoma Park has a very diverse population, including many of Asian descent.