Cut each piece of fried tofu in half to create 8 pieces.

In a medium pot, combine the dashi stock, soy sauce, mirin, sake, and sugar. Bring to a boil over medium-high heat.

Once the mixture comes to a boil, reduce the heat to medium and add the tofu pieces to the pot.

Let the tofu simmer in the broth for about 10 minutes, until it has absorbed some of the broth.

In a mixing bowl, combine the chopped green onions, grated daikon radish, and grated ginger.

Use a ladle to transfer the tofu and broth to serving bowls.

Garnish the bowls with the green onion, daikon, and ginger mixture.