To prepare the strawberries, wash and dry them thoroughly with paper towels. Then pluck the ring of leaves off the strawberry but do not remove the core. Use kitchen shears to trim off any remaining stem.
9 strawberries
Measure out a tablespoon of red bean paste and work it into a disk using your fingers. Place a strawberry in the center with the tip facing up and then form the bean paste up the sides of the berry, leaving the tip exposed. Repeat with the rest of the strawberries, and cover and set aside.
180 grams sweet red bean paste
To make the mochi, add the mochiko, sugar, and milk powder to a microwave-safe bowl and whisk them together.
90 grams mochiko, 70 grams sugar, 2 tablespoons milk powder
Add the sweetened condensed milk and about a third of the whole milk. Whisk this until it forms a smooth paste.
3 tablespoons sweetened condensed milk, 3/4 cup whole milk
Whisk in the remaining milk and stir until the mixture is smooth and free of lumps.
Put the bowl in a microwave oven and heat for 2 1/2 minutes at 600 watts.
Remove the bowl and whisk the mixture together, breaking up any large lumps (it's okay if there are some small ones). Return the bowl to the microwave oven and cook for an additional 3 1/2 minutes at 600 watts.
Use a stiff silicone spatula to knead the mixture until it's smooth and elastic.
Transfer to a sheet of plastic wrap and use the wrap to shape the mochi into a square.
Unwrap the mochi and generously dust it with potato starch. Cut the mochi into 9 even pieces.
Potato starch
Roll out a piece of mochi using a small rolling pin, so it's about 3-inches in diameter, and put it in the palm of your hand.
Place a strawberry into the center of the mochi with the tip facing down. Stretch the edges of the mochi up to the top and pinch them together. Work your way around the strawberry to seal the Daifuku shut.
Roll the Strawberry Mochi between your hands to give it a nice round shape, and repeat the last two steps with the remaining strawberries.