An International Space Station school contact took place between astronaut Dan Burbank KC5ZSX and Japanese Scouts on April 14, 2012.
The Scouts were from Troop 2nd & 3rd Iruma Group, Saitama Scout Council Scout Association Of Japan, Iruma and used the callsign 8N1BSI.
Radio amateur Dan Burbank KC5ZSX was using the callsign NA1SS from one of the two amateur radio stations that have been installed on the ISS.
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ARISS ham radio contact with Japanese Scouts
Amateur Radio on the International Space Station (ARISS) http://ariss.rac.ca/