2Add 100 grams Koikuchi soy sauce, 50 grams Mirin, 50 grams Sake, 15 grams Sugar, 20 grams sliced Ginger, 30 grams roughly chopped Scallion, and 500 grams Water to the pot. Bring to a simmer.
3Return the seared Pork belly block to the pot. Ensure it is mostly submerged. Simmer for 2-3 hours until very tender. Let the chashu cool in the braising liquid, then remove and slice thickly before serving.