Pour 500 ml dashi stock into a saucepan and add 2½ tbsp Japanese soy sauce (koikuchi shoyu), 1 tbsp mirin and bring to boil over a high heat. Let it boil for 1-2 minutes.
Turn off the heat and add ¼ tsp salt. Mix well. Reheat before serving if necessary.
Add 4 rashers bacon to a frying pan heated on medium and fry until crispy on both sides.
Crack 2 eggs into the pan and fry sunny side up until cooked to your liking. (If you prefer the yolk cooked, flip or steam with a lid.)
Boil 2 portions udon noodles according to the instructions on the packaging. Drain and rinse with fresh hot water to remove the excess starch.
Take 4 slices kamaboko fish cake and cut along the bottom of the pink line until halfway.
Place the flap flat on the chopping board and cut through the middle.
Fold them under so the edge is in the middle.
Give the rabbit a face by placing one sesame seed for the eye. Dip a chopstick into ketchup and dab it under the eye for rosy cheeks.
Divide the noodles and broth evenly into serving bowls and top each portion with 2 slices of bacon, one fried egg, 2 kamaboko rabbits, finely chopped green onions and tempura flakes (tenkasu). Enjoy!
Notes
Rinse & Rewarm Udon: Rinse cooked noodles under cold water to tighten texture, then dip briefly in hot water to reheat without turning them mushy.Make-Ahead Garnish: Shape kamaboko rabbits up to 1 day ahead; cover and refrigerate to prevent drying.Storage (Fridge): Store broth and cooked udon separately in airtight containers for up to 2 days; keep eggs, bacon, and garnishes separate and cook fresh.Meal-Prep Plan: Make broth up to 3 days ahead; slice rabbits up to 2 days ahead; cook bacon 1 day ahead and re-crisp in a skillet, cook udon and eggs fresh at serving.Serving Ideas:Spinach Ohitashi, Chilled Edamame with Sea Salt, Agedashi Tofu, Shiso Tomato SaladNutrition Note: Most people don't finish all the broth, so actual intake is less than the full nutrition listing.