Experience the delightful fusion of flavors with this Japanese sweet potato rice recipe. Combining the natural sweetness of Japanese sweet potato with the savory notes of soy sauce, this dish offers a comforting and nutritious meal that is both simple and satisfying. Perfect for any occasion, it brings a touch of Japanese cuisine to your table.
If you are not familiar with Japanese sweet potato, it is a unique variety known for its purple skin and creamy, sweet flesh. Unlike regular sweet potatoes, it has a distinct flavor and texture that pairs wonderfully with rice. You may need to visit an Asian supermarket or a specialty grocery store to find it. Additionally, using Japanese short-grain rice is crucial for achieving the right texture and stickiness in this dish.

Ingredients For Japanese Sweet Potato Rice Recipe
Japanese short-grain rice: Essential for achieving the perfect sticky and chewy texture typical of Japanese rice dishes.
Japanese sweet potato: Adds a natural sweetness and creamy texture, distinct from regular sweet potatoes.
Water: Necessary for cooking the rice and ensuring it reaches the right consistency.
Soy sauce: Provides a savory umami flavor that complements the sweetness of the sweet potato.
Salt: Enhances the overall flavor of the dish, balancing the sweetness and umami.
Technique Tip for This Recipe
To enhance the flavor of the japanese sweet potato, consider soaking the diced pieces in water for about 10 minutes before adding them to the rice cooker. This helps to remove excess starch and ensures that the sweet potato pieces remain tender and flavorful. Additionally, using a high-quality soy sauce can elevate the overall taste of the dish, so opt for a premium brand if possible.
Suggested Side Dishes
Alternative Ingredients
japanese short-grain rice - Substitute with sushi rice: Sushi rice has a similar sticky texture and short grain size, making it a suitable alternative.
japanese short-grain rice - Substitute with arborio rice: Arborio rice, commonly used in risotto, has a similar starchy quality that can mimic the texture of Japanese short-grain rice.
japanese sweet potato - Substitute with regular sweet potato: Regular sweet potatoes have a similar sweetness and texture, though they may be slightly less dense.
japanese sweet potato - Substitute with purple yam: Purple yams have a similar sweetness and can add a unique color to the dish.
water - Substitute with dashi stock: Dashi stock can add an extra layer of umami flavor to the rice.
water - Substitute with vegetable broth: Vegetable broth can add more depth of flavor compared to plain water.
soy sauce - Substitute with tamari: Tamari is a gluten-free alternative that has a similar taste to soy sauce.
soy sauce - Substitute with coconut aminos: Coconut aminos are a soy-free alternative that provides a similar umami flavor.
salt - Substitute with sea salt: Sea salt can be used in the same quantity and provides a similar taste.
salt - Substitute with kosher salt: Kosher salt can be used as a direct substitute, though you may need to adjust the quantity slightly.
Other Alternative Recipes Similar to This Dish
How to Store or Freeze This Dish
- Allow the Japanese sweet potato rice to cool to room temperature before storing. This prevents condensation, which can make the rice soggy.
- Transfer the cooled rice to an airtight container. Make sure the container is clean and dry to maintain the freshness of the rice.
- Store the container in the refrigerator if you plan to consume the rice within 3-4 days. This keeps the sweet potatoes and rice fresh and flavorful.
- For longer storage, place the rice in a freezer-safe container or a resealable plastic bag. Flatten the rice in the bag to ensure even freezing and easier thawing.
- Label the container or bag with the date to keep track of its freshness. Frozen Japanese sweet potato rice can be stored for up to 1 month.
- When ready to eat, reheat refrigerated rice in the microwave. Add a splash of water to maintain moisture and cover with a microwave-safe lid or wrap.
- For frozen rice, thaw it in the refrigerator overnight or use the defrost setting on your microwave. Reheat thoroughly before serving.
- To enhance the flavor, consider adding a bit of soy sauce or a sprinkle of salt when reheating. This revives the taste and aroma of the dish.
- Avoid reheating the rice multiple times, as this can degrade its texture and flavor. Reheat only the portion you plan to consume.
How to Reheat Leftovers
Microwave method:
- Place the leftover Japanese sweet potato rice in a microwave-safe bowl.
- Sprinkle a few drops of water over the rice to add moisture.
- Cover the bowl with a microwave-safe lid or a damp paper towel.
- Microwave on medium power for 1-2 minutes, stirring halfway through to ensure even heating.
- Let it sit for a minute before serving to allow the heat to distribute evenly.
Stovetop method:
- Heat a non-stick skillet over medium heat.
- Add a small amount of olive oil or butter to the skillet.
- Add the leftover Japanese sweet potato rice to the skillet and spread it out evenly.
- Stir occasionally, breaking up any clumps, and cook for about 5-7 minutes until the rice is heated through.
- Optionally, add a splash of soy sauce or a sprinkle of salt to enhance the flavor.
Steaming method:
- Place the leftover Japanese sweet potato rice in a heatproof dish that fits inside a steamer basket.
- Add a few tablespoons of water to the rice to help rehydrate it.
- Set up your steamer and bring the water to a boil.
- Place the dish with the rice in the steamer basket and cover with a lid.
- Steam for about 5-10 minutes until the rice is thoroughly heated.
Oven method:
- Preheat your oven to 300°F (150°C).
- Place the leftover Japanese sweet potato rice in an oven-safe dish.
- Add a few tablespoons of water or broth to the rice to keep it moist.
- Cover the dish with aluminum foil to prevent drying out.
- Bake for about 15-20 minutes, or until the rice is heated through.
Best Tools for This Recipe
Rice cooker: Essential for cooking the rice and sweet potato mixture to perfection.
Measuring cups: Used to measure the rice and water accurately.
Peeler: Necessary for peeling the Japanese sweet potato.
Knife: Used to dice the Japanese sweet potato into small pieces.
Cutting board: Provides a safe surface for dicing the sweet potato.
Mixing spoon: Useful for fluffing the rice and sweet potatoes together after cooking.
Colander: Helps in rinsing the rice under cold water until the water runs clear.
How to Save Time on Making This Recipe
Rinse the rice efficiently: Use a fine-mesh strainer to rinse the rice quickly and thoroughly.
Prep sweet potatoes ahead: Peel and dice the sweet potato in advance and store in water to prevent browning.
Use a rice cooker: A rice cooker automates the cooking process, freeing you up for other tasks.
Measure ingredients accurately: Pre-measure the soy sauce, salt, and water to streamline the cooking process.
Fluff immediately: Fluff the rice and sweet potatoes as soon as cooking is complete to prevent clumping.

Japanese Sweet Potato Rice Recipe
Ingredients
Main Ingredients
- 2 cups Japanese short-grain rice
- 1 medium Japanese sweet potato peeled and diced
- 2 cups Water
- 1 tablespoon Soy sauce
- 1 teaspoon Salt
Instructions
- Rinse the rice under cold water until the water runs clear.
- Place the rice in the rice cooker and add the water, soy sauce, and salt.
- Add the diced sweet potato on top of the rice.
- Start the rice cooker and cook until done.
- Once cooked, fluff the rice and sweet potatoes together before serving.
Nutritional Value
Keywords
Suggested Appetizers and Desserts for This Recipe
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