Step 1: Prepare Your Ingredients - Gather all your ingredients and ensure your egg whites are chilled.
Step 2: Make the Batter - In a mixing bowl, whisk together the egg yolks, buttermilk, white sugar, vanilla extract, and Japanese mayonnaise until smooth.
Step 3: Combine Dry Ingredients - In another bowl, sift together the all-purpose flour and baking powder.
Step 4: Mix Wet and Dry - Gently fold the dry ingredients into the wet mixture until just combined.
Step 5: Whip the Egg Whites - In a clean bowl, whip the chilled egg whites until they reach stiff peaks.
Step 6: Fold in the Egg Whites - Gently fold the whipped egg whites into the batter in three additions.
Step 7: Heat the Skillet - Heat your skillet over low to medium-low heat and add a light coating of vegetable oil.
Step 8: Cook the Pancakes - Pour the batter onto the skillet. Cook for about 4-5 minutes until bubbles form on the surface.
Step 9: Flip and Finish - Carefully flip the pancakes and cook for another 4-5 minutes until golden brown.
Step 10: Serve and Enjoy! - Stack the pancakes on a plate and serve them warm with your favorite toppings.