Heat frying pan at medium heat, and lightly sear A5 Wagyu Yakiniku and then set it aside.
Cut Japan naganegi diagonally. Set Aside
Cook udon in boiling water. If udon is frozen, cook a couple of minutes longer. Drain water, and set aside.
Heat dashi to a boil. Add salt, soy sauce, Mirin, Sake and let it simmer for 2-3 minutes
Place noodles into a bowl, topwith lightly seared A5 Wagyu Yakiniku and cut Japan naganegi. Pour boiling hot soup directly over yakiniku and naganegi. Sprinkle with shichimi and serve.