Start by mixing flour, salt, sugar, and baking powder in a bowl. Gradually add grated yam, dashi, and eggs. Stir until smooth and slightly sticky for a soft, fluffy texture.
Fold in shredded cabbage and tempura scraps. If you want protein, add pork, shrimp, or your preferred ingredient. Make sure everything is evenly coated with batter.
Heat a lightly oiled skillet over medium heat. Pour batter into rounds, press slightly, and cook until golden brown on both sides. Flip carefully to avoid breaking the pancake.
Brush okonomiyaki sauce on top and drizzle with Kewpie mayonnaise. Sprinkle aonori and bonito flakes. Serve immediately while hot and enjoy the “dancing” flakes!