Tonkatsu Sauce: Japan's Thick, Fruity Brown Sauce
とんかつソース
By the Aoi's Japanese School Lunch team · November 9, 2026 · 2 min read
What Japanese tonkatsu sauce is, how it differs from chuno and Worcestershire, how it's used in meat sauce, and what to use if you can't find it.
In the video "You Won't Believe How EASY Japanese Meat Sauce Spaghetti Is To Make," tonkatsu sauce goes into the meat sauce with tomatoes and ketchup. It's a thick, sweet and tangy Japanese brown sauce, named after tonkatsu (breaded pork cutlet) but used well beyond it.
What is tonkatsu sauce?
- The thickest of Japan's brown sauces. Japan's standard sorts these sauces by thickness, as our Bull-Dog Worcestershire article explains. The thickest class, noko, is also known as tonkatsu sauce.
- Made with fruit and vegetables. A US store listing for Bull-Dog's bottle shows tomato paste, apple, prune, carrot and onion, along with vinegar, sugar and spices.
- Sold abroad. Bull-Dog's export bottle is labeled "Vegetable & Fruit Sauce (Tonkatsu Sauce)."
How it's used in the video
- 1:13 Diced tomatoes, ketchup, tonkatsu sauce, salt, pepper and water go in with the meat and vegetables. The video description lists 30 g (1 oz) of tonkatsu sauce.
- 1:18 The sauce simmers over low heat for 15 minutes to cook off the acidity.
Tonkatsu, chuno or Worcestershire?
- Tonkatsu (thick): the thickest of the three.
- Chuno (medium): used in 29 recipes on this site. Tonkatsu sauce can stand in for it. See the glossary entry.
- Worcestershire (thin): thinner and sharper, so it won't give the same body on its own.
Allergy notes
Labels differ by country. The US listing we checked names soy. UK and EU listings name soy and celery, and one also names gluten. If you're avoiding any of these, check the bottle in your hand.
Can't find it?
- Use chuno sauce or another thick Japanese brown sauce. Start with the same amount and taste.
- Mix your own. Stir Worcestershire sauce into ketchup, then adjust with a little sugar. This is a common home swap, not an exact match.
Also in this video: soft noodles, tube garlic and the Bunbun Chopper.
