Ooooh, how could you eat these cute little sushi art pandas? ;-)
On the page they only say that they are Onigiri (filled rice balls) decorated with seaweed as pandas.
You can find recipes for Onigiri everywhere in internet.
Links:
The original site doesn’t exist any more and is now available through webarchive:
Sushi Art Pandas (Panda-Onigiri)
via: Fun Sushi Art!
English Wikipedia entry for ‘Onigiri’
German Wikipedia entry for ‘Onigiri’