Steam Japanese Style Rice

Was thinking of preparing something different so I came up with this simple version of steam rice.

Ingredients:
2 cups of rice
3 large dried mushrooms
1 Japanese sweet potato
2 tablespoon of sukiyaki sauce

Method:
Wash the mushrooms and soak in water to soften it.
Cut them into small slices after they soften.
Bring the water used to soak mushroom to a boil and add in the mushroom. If time permits, boil for half an hour and add in sweet potato ( skin removed and cut into small pieces ).
Add in the sukiyaki sauce.
Wash the rice and use the boiled mushroom broth to cook the rice.
Either mix the mushrooms and sweet potato thoroughly or place on top if the rice.
Cook it using rice cooker and it's done.