Grilled Mackerel with Shio Koji

Grilled Mackerel with Shio Koji

Low in calorie and rich in protein, this dish makes a lean and healthy option for everyday cooking. Marinating the mackerel with Shio Koji allows the flavor to permeate throughout the flesh. Also grilling the fish lends it a crispy light char and leaves the inner fillet meat ‘melt-in-your-mouth’ tender.
Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Servings 2


  • 2 small fillets (⅓ lb, 150g) mackerel
  • 2 tbsp Hikari Miso Shio Koji
  • Lemon wedges


  1. In a flat container, put mackerel and Hikari Miso Shio Koji together and marinate for at least 30 minutes.
  2. Grill or broil the fish at 350F (180C) for 25-30 minutes. Or pan fry the fish over medium low heat.
  3. Serve immediately with slices of lemon

Recipe Notes

Quick Tip: Adjust the marinating time according to the size of your mackerel fillets.


Message from Nami: “If you like grilled salted mackerel served in Japanese restaurants or bento boxes, you will love this mackerel with Shio Koji! Simply replace the salt with Shio Koji. Umami flavor from Shio Koji enhances this simple dish!”


About Nami: A native of Yokohama, Japan, Nami inherited her passion for cooking and her culinary basics from her mother. In 2011, she started a blog "Just One Cookbook” to organize her Japanese recipes that she had been sharing with her friends. The blog, featuring easy-to-follow instructions and beautiful pictures, has become extremely popular around the world. In December 2013, she published an ebook titled "Just One Cookbook – Essential Japanese Recipes" with 33 easy and simple recipes from her archives. Nami currently resides in the San Francisco Bay area with her family.

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