Cut 10 cm Japanese leek (naganegi) (white part) horizontally to the core and peel off outer layers.
Press the layers flat on a cutting board and cut thinly along the grain to make strings.
Place the strings of leek in a bowl of ice cold water for 10 minutes, then drain.
Measure out 4 tbsp water. Take a saucepan and add 1 tbsp turbinado sugar and about 1/3 of the water. Place the pan on the stove and heat on medium, swirl the pan around occasionally for even heating (avoid mixing).
Once it turns golden, add the rest of the water and swirl it around. (Be careful of splashing, protect your skin with oven mitts and long sleeves.)
Reduce the heat to medium-low and add the 1 ½ tbsp Japanese soy sauce (koikuchi shoyu), 1 tsp sake, 1 tsp mirin and 1 tsp honey. Continue to heat until it reaches a thin syrup-like consistency, then turn off the heat and set aside for later.
Cut 300 g slab skinless pork belly into thick slices about 4-5mm thick (a little less than 1/4 inch).
Place it in a bowl and add 1 pinch salt and pepper and 1 tsp potato starch. Mix until evenly covered.
Heat a large frying pan on medium-high, and add 2 tsp cooking oil. Once hot, arrange the pork slices in a single layer without overlapping, and fry until golden brown on one side.
Flip the pork slices and use a piece of kitchen paper to wipe the excess rendered fat out of the pan.
Pour the sauce all over the pork slices and move them around in the caramel sauce to coat. Continue to heat until thickened and clings to the surface of the pork, then remove from the heat.
Dish up 2 portions cooked Japanese short-grain rice in serving bowls and arrange the pork slices on top. Garnish with the shiraganegi, green peas (or edamame) and red pickled ginger (benishoga). Enjoy!
Notes
Choose fattier cuts like pork belly, shoulder, or butt for a juicier, beginner-friendly bowl. Loin dries out fast without precise timing.Stop the caramel at deep amber (≈320 °F / 160 °C); darker syrup turns bitter and masks the glaze's sweetness.You can blowtorch the glazed pork for 10 seconds to mimic charcoal aroma without a grill.Serving ideas: Daikon Salad, Mushroom Miso Soup, Pickled Cucumber, Pickled Napa Cabbage.