Rinse the rice well until the water runs clear and add it to the rice cooker inner pot.
Add enough water to reach the 2 cups line and add the dashi, soy sauce, and sake. Stir to combine.
Place the salmon fillets and ginger on top of the rice and close the lid.
Select the [Plain] function and press start.
When the cooking is done, use the rice paddle to break the salmon and mix it into the rice. You can remove the skin at this point.
Transfer the rice to a serving bowl and top with scallions. Serve.