Shio koji (塩麹) has a salty, savory, and slightly sweet taste. It is often used as a natural seasoning and tenderizer for meats, fish, and vegetables, as well as in marinades, dressings, and sauces. Shio koji is believed to have several health benefits, including aiding digestion, boosting the immune system, and promoting healthy skin.

Shio koji is gaining popularity outside of Japan and can be found in specialty Asian grocery stores or online. It is also relatively easy to make at home using simple ingredients and equipment.