Wash the yuzu thoroughly and chop it finely.
Preheat the oven to 180°C (356°F).
Combine flour, baking powder, sugar, and salt in a bowl.
Add cold butter, break it into small pieces, and mix.
Add the egg and milk, then knead into dough.
Mix in the chopped yuzu and raisins.
Shape the dough into rounds and place on the pan.
Bake in the oven at 180°C for 20-25 minutes.