Bring a pot of water to a rolling boil and add 2 ptn ramen noodles. Take 10 seconds away from every minute of cooking according to the package instructions to achieve al dente. (1 minute minus 10 seconds becomes 50 seconds, etc.) Stir occasionally.
While the noodles are boiling, take a small pan and add 1 ½ tbsp Japanese soy sauce (koikuchi shoyu), 1 ½ tbsp mirin, 1 ½ tbsp sake, ½ tsp oyster sauce, ½ tsp sugar, and ½ tsp dashi granules. Mix and heat over medium-low, let it bubble for about 1 minute then remove from the heat.
Once the noodles are cooked, drain them and rinse them under running water until they reach a little over body temperature (approx 40 °C (104 °F)).
Divide the sauce between serving bowls.
Place the noodles on top and make a well in the center. Crack a pasteurized egg into the space.
Add your choice of toppings. I add ham, toasted sesame oil, lemon, bonito flakes (katsuobushi), and wasabi paste.
Mix thoroughly, about 20-25 times until the egg has emulsified with the sauce and coated the noodles. Enjoy!
Notes
Cool noodles to approximately body temperature - this is the ideal temperature zone where eggs won't cook but will properly emulsify.
Thoroughly drain excess water from noodles to prevent diluting the sauce.
For a TKG-inspired finish, add a small portion of rice at the end to soak up remaining sauce.