Let’s start with making the dipping sauce Men-tsuyu by pouring the dashi stock, soy sauce and mirin in a casserole. When it boils take it away from the stow and let it cool down.
Pour 2 liters of water in a casserole and bring to boil. Lower the heat and add the noodles. Boil for 4-5 minutes.
Rinse well in cold water. Place the noodles in a big bowl with icy water and let cool down for 10 minutes in the water.
Pour the dipping in 2 small bowls big enough to dip the noodles in.
Place the noodles on Japanese noodle plates. Cut thin slices of nori on top of the noodles.