Peel your oranges and divide shiroan into three balls, 70g each.
Using your hands, flatten a ball of shiroan and wrap it around your orange. Repeat for the other two oranges.
Set aside the wrapped oranges while you prepare the mochi.
Add shiratamako, sugar, orange juice, and food coloring in a bowl. Mix to combine.
Transfer mochi batter to microwave safe bowl (I line my bowl with a damp washcloth) and cover well with plastic wrap, another dish, or other cover. Microwave for 2 minutes and 30 seconds.
Carefully dump cooked mochi onto a surface lightly dusted with katakuriko. Divide into three pieces. While you work with one piece, keep the others covered with a damp cloth so they don't dry out.
Flatten one piece (either with a small rolling pin or your hand), and place wrapped orange in the center. Remember if you want to cut a nice cross section view of the orange, you need to place the orange on its side.
Wrap the mochi around the orange, pinching the edges to seal them. Dust in katakuriko and you're done! Daifuku should be eaten the day they are made.