What Is Katsu? A Quick History of Japan's Crispiest Comfort Food

Katsu has roots in the Meiji era (1868–1912), when Japanese chefs began adapting European dishes for local tastes. The restaurant Rengatei in Ginza, Tokyo, is credited with serving the first version in 1895, swapping the French pan-fried côtelette de veau for a deep-fried approach borrowed from tempura. The result was something entirely new.

The word "tonkatsu" combines ton (pork) with katsu, a shortened form of katsuretsu, the Japanese phonetic rendering of "cutlet." It belongs to a category called yōshoku, Japanese-adapted Western cuisine, alongside curry rice and croquettes. Chicken katsu followed naturally from tonkatsu, and katsu curry has since become a global staple in its own right.

Katsu has surged in popularity thanks to anime culture introducing younger diners to Japanese food, Wagamama popularizing katsu curry across the UK, and a growing appetite for Japanese flavors in the US market. It's approachable, deeply satisfying, and endlessly adaptable.

The Japanese Pantry Staples You Need for Authentic Katsu

Customers ask us regularly what makes homemade katsu taste different from a regular breaded cutlet. The answer almost always comes down to ingredients. Here's what you need.

Panko breadcrumbs are the foundation. Unlike Western breadcrumbs, panko is made from crustless white bread ground into coarse, airy flakes. Those larger flakes create more surface area for crunch while absorbing less oil during frying. Kikkoman expanded its panko production facility in April 2025 specifically to meet surging global demand, a clear sign of how essential this ingredient has become.

Tonkatsu sauce is non-negotiable. Bull-Dog brand is the classic choice: a sweet-savory, Worcestershire-style condiment that balances the richness of fried katsu perfectly. No substitute captures the same flavor.

Japanese short-grain rice serves as the proper base for katsu curry and katsudon. Its sticky, slightly sweet character holds up under sauces in a way long-grain rice simply can't.

Japanese curry roux blocks from S&B or House Foods are how you build an authentic katsu curry. These pre-made roux cubes produce a thick, mild, slightly sweet curry that's distinctly different from Indian or Thai curries. They're engineered for consistency and work beautifully every time.

Optional but recommended: Japanese mustard (karashi) for heat, mirin for sweetness in simmered dishes, and a neutral frying oil like canola or vegetable oil. All of these staples are available at our Marietta, GA location or online for nationwide shipping.

How to Make Perfectly Crispy Tonkatsu (Pork Katsu)

Start with a thick-cut pork loin or tenderloin cutlet. Pound it to an even thickness (about ½ inch) so every part cooks at the same rate. Score the fat cap with a few shallow cuts to prevent the cutlet from curling in the oil. A light dry-brine with salt, followed by 10–15 minutes of resting, draws out surface moisture and helps the breading stick.

Set up a standard breading station: flour, then egg wash, then panko. Press the panko firmly onto the surface with your hands so it adheres without gaps. Loose panko falls off in the oil and burns, so take your time here.

Oil temperature is the single most important factor. Maintain 340–350°F (170–180°C) throughout the fry. When oil drops below 325°F, the breading can't seal quickly enough. Instead of crisping on the outside, the cutlet absorbs oil, leaving you with a greasy, soggy result. Use a thermometer. It makes all the difference.

Avoid overcrowding the pan. Fry one or two pieces at a time so the oil temperature stays stable. Each cutlet needs about 4–5 minutes total, flipping once, until deep golden brown.

When the katsu comes out of the oil, rest it on a wire rack, not paper towels. Paper towels trap steam against the bottom crust and soften it. A wire rack lets air circulate on all sides, keeping everything crisp.

Slice against the grain before serving. Plate with shredded cabbage, a dab of karashi mustard, and a generous pour of Bull-Dog tonkatsu sauce.

Chicken Katsu: Breast vs. Thigh and How to Get It Right

Chicken breast is the more traditional choice. It slices cleanly and has a neutral flavor that lets the panko crust shine. Butterfly the breast and pound it thin (about ¼ inch) for even cooking.

Chicken thigh is juicier, more forgiving, and harder to overcook. If you're new to making katsu, thigh is a great place to start. The breading and frying technique is identical to tonkatsu, though cook time is slightly shorter due to the thinner cut.

Here's a tip rarely covered elsewhere: the nama panko technique. Lightly mist your dried panko with water before coating. This creates a slightly damp crumb that puffs up more dramatically during frying, producing an even crispier, more authentic crust.

For a lighter option, air fryer katsu works surprisingly well. Set your air fryer to 375°F and cook for 12–14 minutes, flipping halfway through. You won't get the exact same crunch as deep frying, but it's a solid alternative for health-conscious cooks. Serve chicken katsu the same way as tonkatsu, or use it as the base for katsu curry.

Katsu Curry: Turning One Batch of Katsu Into a Full Meal

Japanese curry has a fascinating origin. It arrived in Japan during the Meiji era via the British Navy, then was adapted with a French-style roux. The result is a curry that's milder, thicker, and slightly sweeter than its Indian counterpart. It's one of the most popular dishes in Japan, enjoyed by everyone from schoolchildren to grandparents.

The core vegetables are simple: onions, carrots, and potatoes. Sauté the onions until deeply caramelized, at least 10–15 minutes, for real depth of flavor. Add carrots and potatoes, cover with water or stock, and simmer until tender.

Once the vegetables are soft, turn off the heat and add your Japanese curry roux blocks (S&B Golden Curry or House Foods Vermont Curry are both excellent). Stir until the roux is fully dissolved, then return to low heat and simmer for another 5–10 minutes until the sauce thickens to a rich, velvety consistency.

When plating, pre-slice your katsu into strips and lay them over a mound of Japanese short-grain rice. Ladle the curry sauce alongside the katsu, not on top. This preserves the crispy crust until you're ready to eat.

The global ready-to-eat katsu curry market reached $1.12 billion USD in 2024, making it the most popular version of Japanese curry worldwide. Homemade is better, though, and it's surprisingly easy to pull off.

For a creative twist, try adding a pinch of garam masala or a square of dark chocolate to your curry as it simmers. Japanese chefs have been experimenting with these additions to create more complex, layered flavors, and they work beautifully with store-bought roux blocks.

Bonus: One Batch of Katsu, Three Legendary Meals

Batch-cooking katsu is one of the smartest moves a home cook can make. One frying session gives you the base for at least three different meals.

Katsu sando: Tuck leftover tonkatsu or chicken katsu into soft Japanese milk bread with tonkatsu sauce and shredded cabbage. This sandwich has become a social media favorite as a next-day meal, and it tastes even better than it looks.

Katsudon: Simmer sliced katsu in a quick broth of dashi, soy sauce, and mirin with sliced onion. Pour beaten egg over the top, cover, and let it set. Serve over steamed rice for one of Japan's most beloved rice bowls.

Freezer meal tip: Bread your uncooked cutlets, arrange them on a parchment-lined sheet tray, and freeze until solid. Transfer to a freezer bag. When you need a quick dinner, air-fry them straight from frozen for a weeknight shortcut that still delivers real crunch.

For non-meat eaters, tofu katsu uses the exact same panko technique. Press firm tofu, slice into cutlet-sized pieces, and run it through the breading station. The crispy exterior and creamy interior make it a satisfying plant-based swap.

Bring Authentic Katsu to Your Kitchen With the Right Ingredients

To recap, your essential katsu pantry includes: panko breadcrumbs, tonkatsu sauce (Bull-Dog is our go-to recommendation), Japanese curry roux blocks from S&B or House Foods, and Japanese short-grain rice. With over 20 years of sourcing experience, we've built our shelves around exactly these kinds of staples.

Authentic results depend on authentic ingredients. Substituting regular breadcrumbs or generic curry powder will get you a different dish entirely.

Tomato Japanese Grocery carries everything you need. Shop in person at our Marietta, GA store or order online for delivery anywhere in the US. We ship with eco-friendly, handle-with-care packaging so your pantry staples arrive in perfect condition.

Japanese cooking doesn't have to be intimidating. Start with katsu. It's approachable, endlessly rewarding, and a gateway to a whole world of flavors. We're here to help you stock your kitchen for the journey.