Cut one whole nappa cabbage in fourths (do not cut the stem because that will hold the napa cabbage together
Lay one napa cabbage leaf flat.
Place a slice of pork on top.
Add another napa leaf, then pork, repeating until you have multiple layers (about 10).
Press gently to flatten.
Cut the layered stack into 2–3 inch wide pieces.
Repeat for all 4 nappa cabbage wedge
To arrange in the rice cooker, stand the cut stacks upright inside the rice cooker bowl. Pack them snugly so they don’t fall over.
For the broth, pour in Water, Dashi, Soy sauce, Mirin, Sake. The liquid should come to about the height of the cabbage. It will release more water as it cooks, so don’t overfill.
Close the rice cooker.
Select Slow Cook for 45 minutes (ideal for Tiger). If you don’t have slow cook, Use the White Rice cycle once
Carefully scoop out the stacks or serve directly from the pot.
Enjoy with ponzu, yuzu kosho, or a splash of chili oil.