Prepare Ground Pork Mixture:

1. Heat 1 tablespoon of olive oil in a pan over medium heat.
2. Sauté diced onion and minced garlic for 1-2 minutes until fragrant.
3. Add ground pork and cook until completely browned.
4. Stir in light soy sauce, dark soy sauce, sugar, 5-spice powder, and pepper.
5. In a small bowl, mix cornstarch with cold water to make a slurry. Add the slurry to the pork mixture and bring it to a boil. Remove from heat and set aside.

Cook Japanese Ramen Noodles:

1. Cook Japanese ramen noodles according to package instructions until al dente. Drain and set aside.

Prepare Tare Sauce:

1. In a bowl, combine warmed chicken broth, light soy sauce, and rice vinegar to make the tare sauce. Set aside.

Assemble Mazesoba:

1. In a serving bowl, pour half of the prepared tare sauce.
2. Add 1 serving of cooked Japanese ramen noodles to the bowl.
3. Top the noodles with sliced green onions, chopped chives, furikake, minced garlic, corn, and ground pork mixture.
4. Sprinkle Shichimi Togarashi over the ground pork.
5. Place an egg yolk on top of each serving.
6. Break nori seaweed into smaller pieces and place them around the bowl.

Serve and Enjoy:

1. Mix all the ingredients together thoroughly, ensuring the noodles are well coated with the sauce and toppings.
2. Serve immediately and enjoy the delicious flavors and textures of this homemade mazesoba!