Shio koji is a three-ingredient Japanese fermented seasoning that tenderizes proteins, boosts umami, and works as a lower-sodium salt substitute. This practical guide covers what it is, how to use it five different ways, common beginner mistakes, health benefits, and where to find it.

Shio koji is a 1,300-year-old Japanese fermented seasoning made from just rice koji, salt, and water. Learn what it is, how to make it at home, creative ways to use it beyond marinades, and where to buy quality rice koji in the US.

Discover five essential Japanese fermented foods, from miso and shio koji to natto and tsukemono, with practical cooking tips and guidance on where to buy them in the US.