🐟Fried Marlin (Kajiki Maguro) with Savory Japanese Aurora Sauce
Enjoy this easy recipe for crispy fried marlin coated in a flavorful Japanese-style aurora sauce made from ketchup, Worcestershire sauce, and mayonnaise. Perfect for dinner or bento.
This dish is a beloved “soul food” found in Japanese school lunches (Kyushoku). While traditionally a hit with children due to its meat-like texture, this version adds whole-grain mustard to create a sophisticated flavor profile that adults will love.
📝 The Story Behind “Kajiki” (Marlin & Swordfish)
In Japan, these fish are collectively called “Kajiki Maguro.” Here is everything you need to know about them:
- Not Actually Tuna: Despite the name, they are a different species from tuna (Maguro). They are called “Kajiki Maguro” because they share similarities like large size, high migration, and premium meat quality.
- The Speedsters of the Sea: They are among the fastest sprinters in the ocean, with some species reaching speeds over 100 km/h.
- Easy to Cook: Kajiki is often sold with the skin and bones already removed. Its light, lean flavor makes it incredibly versatile—it pairs perfectly with butter, garlic, soy sauce, or miso.
Classification and Characteristics of Billfish & Swordfish
| Kajiki maguro | Billfish (Makajiki) | Swordfish (Mekajiki) |
| Scientific Family | Perciformes: Istiophoridae | Perciformes: Xiphiidae |
| Species | 11 species (Marlin, Sailfish, etc.) | 1 species (Swordfish only) |
| Japanese Name | Makajiki | Mekajiki |
| Taste Profile | Of all kajiki maguro, the marlin is considered the most delicious. | Known for its rich, fatty texture; very popular. |
| Peak Season | Summer | Winter |
| Availability | Difficult to obtain outside of its peak season. | Available year-round (mostly sold frozen). |
Quick Culinary Notes
- Marlin (Makajiki): Often praised for its firm texture and elegant reddish flesh, making it a high-end choice for sashimi or sushi.
- Swordfish (Mekajiki): With its high fat content, it stays moist and tender even when sautéed or grilled, making it a versatile favorite for home cooking.
🥗 Nutrition Facts (Per Serving)
- Calories: 216 kcal
- Protein: 20.5g
- Fat: 8.5g (calculated with an 8% oil absorption rate)
- Carbohydrates: 10.4g
- Salt Equivalent: 2.0g
🛒 Ingredients
- Main: 100g Marlin (or Swordfish)
- Seasoning: 1g Grated Garlic, 0.5g Salt
- Coating: 4g Flour (I recommend “Cooking Flower” for a crispy, non-sticky finish)
- The Sauce:
- 10g Tomato Ketchup
- 10g Worcestershire Sauce
- 3g Whole-grain Mustard
- Cooking Oil: Moderate amount
👩🍳 Cooking Instructions
- Prep: Rub the grated garlic and salt onto the fish, then dust evenly with flour.
- Fry: Heat oil to 170°C (340°F). Fry the fish until it turns a beautiful golden brown.
- Sauce: While the fish is frying, mix the ketchup, Worcestershire sauce, and grain mustard in a bowl.
- Finish: Drain the excess oil from the fish and toss it immediately into the sauce until thoroughly coated.
💡 Chef’s Memo: What is Aurora Sauce? In Europe, “Aurora Sauce” is traditionally a Béchamel base with tomato. However, in Japan, it almost always refers to a Ketchup and Mayonnaise mix. In this specific recipe, we use Ketchup and Worcestershire sauce to create a deeper, savory glaze that complements the “meaty” texture of the marlin perfectly.
🍤 You Might Also Like… If you want to try the classic Japanese-style Aurora sauce—the popular combination of ketchup and mayonnaise—don’t miss this recipe! These succulent shrimp fritters coated in a rich, creamy sauce are absolutely addictive.👉 Ebi Mayo (Fluffy Shrimp Fritter With Japanese Aurora Sauce)
📖Read the Japanese version of this article here! [【懐かしの給食メニュー】カジキの唐揚げ特製オーロラソース和え]
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