Japanese Meatballs with Ketchup Sauce (Niku-dango)

When I was growing up in Japan, one of the comfort foods I always looked forward to was Japanese meatballs coated in a glossy ketchup-based sauce. Known as niku-dango (肉団子), this simple home-cooked dish combines juicy pork meatballs with a sweet-and-savory sauce that perfectly balances tangy, sweet, and umami flavors.

The sauce is made with everyday pantry ingredients like ketchup, rice vinegar, soy sauce, and sugar. While it may remind you of sweet and sour sauce, the ketchup gives it a mellow sweetness and richness that makes it uniquely Japanese.

This dish is a staple in many Japanese households because it's easy to prepare, budget-friendly, and loved by both kids and adults. Serve it with steamed rice and vegetables for a complete meal, or pack leftovers into a bento lunch the next day.

If you're looking for a comforting Japanese dinner recipe that's quick enough for busy weeknights, these Japanese Meatballs with Ketchup Sauce are sure to become a family favorite.

What is Niku-dango?

Niku-dango literally means "meatballs" in Japanese. Unlike Italian-style meatballs that are often served with tomato sauce, Japanese meatballs are usually smaller and feature sauces that balance sweet and savory flavors.

One popular variation is this ketchup-based version, which is commonly served in home kitchens, school lunches, and bento boxes throughout Japan. The tender pork meatballs absorb the flavorful sauce, making them especially delicious when paired with rice.

Why You'll Love This Recipe

Ready in about 30 minutes
Uses simple pantry ingredients
Kid-friendly sweet and savory flavor
Perfect for meal prep and bento lunches
Great served with rice and vegetables
Authentic Japanese home-cooking comfort food

Tips for Success

Don't Skip Cooking the Onion

Sautéing the onion first removes excess moisture and sweetness while helping create a softer texture in the meatballs.

Mix Until Sticky

Japanese-style meatball mixtures are typically mixed thoroughly until sticky. This helps create a tender yet cohesive texture.

Use Potato Starch for the Best Texture

Potato starch gives the sauce its characteristic glossy finish. Cornstarch can be substituted if needed.

Make Ahead

You can prepare the meatballs ahead of time and store them in the refrigerator for up to 24 hours before cooking.

RECIPE

Servings: 4-5

Time: 30 min

Ingredients:

1 lb ground pork
1/2 onion, finely chopped
1 egg
3 tbsp panko breadcrumbs
1 tbsp milk
salt and pepper to taste

Ketchup Sauce

3 tbsp ketchup
3 tbsp rice vinegar
3 tbsp sugar
1 tbsp soy sauce
1 cup water
1 tbsp potato starch

Instructions:

Prepare the sauce:
In a small bowl, mix ketchup, rice vinegar, sugar, and soy sauce until smooth.
In another bowl, dissolve the potato starch in water for slurry, and set aside.
Cook the onion:
Finely chop onion.
Heat a splash of oil in a skillet over medium heat.
Add the chopped onion and sauté until soft and translucent.
Transfer to a large mixing bowl to cool slightly.
Make the meatballs
To the bowl with onions, add ground pork, egg, panko breadcrumbs, milk, salt, and pepper.
Mix well until the mixture is sticky and holds together.
Roll the mixture into golf ball-sized portions.
Cook the meatballs:
Heat the pan again with a little oil.
Add the meatballs and cook over medium heat, turning occasionally, until browned on all sides and cooked through.
Remove them from the pan.
Make the ketchup sauce:
Pour the prepared sauce mixture into the same pan.
Add the starch-water mixture and stir until the sauce begins to thicken.
Coat the meatballs:
Return the meatballs to the pan and gently toss until evenly coated with the glossy ketchup sauce.