Pork Rice Bowl (Butadon)

Steps

1. 1
   Cut the onion in half. Slice one half against the grain into approximately 1 cm wide strips and discard the core. Grate the other half and set aside.
2. 2
   Cut the pork into bite-sized pieces by quartering each slice.
3. 3
   Place pork in a plastic bag, gently separate any clumps, and add grated onion, garlic, ginger, sugar, and sake. Massage thoroughly to combine.
4. 4
   Seal the bag and marinate in the refrigerator for 15 minutes.
5. 5
   Remove the marinated pork from the refrigerator and let it sit at room temperature for 15 minutes to bring it to room temperature.
6. 6
   Heat about 1 teaspoon of oil in a frying pan over medium heat for 30 seconds. Add the sliced onion and sauté until golden brown and fragrant.
7. 7
   Add the marinated pork with all its marinade to the pan and stir-fry until about 80-90% cooked.
8. 8
   Add water and mirin, stir well, bring to a boil, then reduce heat and simmer for 2 minutes.
9. 9
   Add soy sauce and continue simmering for about 3 minutes until the sauce reduces and the pork is tender and well-seasoned.
10. 10
    Serve the pork over hot rice and drizzle generously with the sauce to enjoy.