How can i make (japanese) rice pink like they do in bento's?

i've seen some pictures of japanese bento's, and the rice were pink? anyone who know how to do that? or isn't it rice? here is a picture:

http://dvice.com/pics/Nintendo-DS-bento-鈥?/a>How can i make (japanese) rice pink like they do in bento's?
Try to add a little annato or achuete .in cooking riceHow can i make (japanese) rice pink like they do in bento's?
A little beet juice, or small piece of beet in the cooking water in the organic way of doing it. Food coloring???How can i make (japanese) rice pink like they do in bento's?
at a drop or 2 of red food coloring. in the water before you add the rice in.How can i make (japanese) rice pink like they do in bento's?
a drop of red food coloring in the water when cooking, or cook rice with a beet.
Food colouring would be an idea.