In a bowl, combine the flour and baking powder. Mix well with a whisk (this replaces sifting). Once combined, add the sugar and mix again.

In a separate bowl, mix the egg, milk, and mirin together.

Add the wet ingredients to the dry ingredients and gently mix. When the flour is just incorporated, add the melted butter and mix. It's okay if there are a few lumps as long as the batter is glossy.

Heat a frying pan, then remove it from the heat. Pour in a scoop of batter. Return the pan to low heat and cook slowly until bubbles form all over the surface.

Flip and cook the other side until golden brown. Enjoy!