Mix the soy sauce, Mirin, garlic and ginger in a large container and add the fish in.
Close the lid and place into the refrigerator and let the fish marinate for 4-6 hours.
Take the fish out of the marinade and pat it dry with a paper towel.
Place a large saucepan on the stove and preheat it on medium heat.
Add the oil to the pan and place the pieces of fish in the pan.
Let the fish cook for 3 minutes and then turn the filets over and cook for another 3 minutes.
Use a temperature probe to ensure the fish is cooked to 145 degrees.
Pull the fish from the pan and serve with rice.
Add some cilantro and sriracha sauce and serve.
