Sango-hachi Doko (三五八漬け床, Tōhoku koji marinade bed)

Ingredients

Equipment Needed

• •Hangiri or wide mixing bowl
• •Ceramic pickle crock, glass jar, or enamel container
• •Clean parchment or plastic wrap for surface covering
• •Fermentation weight, or a small clean plate that fits inside the container

Instructions

1. 1

   Steam the rice

   Cook the short-grain rice a little firmer than table rice and let it cool until warm to the touch, not hot. Hot rice can weaken the koji's enzymes, and cold rice refuses to mix cleanly. You want the grains soft enough to bind the bed but still separate enough to work through with your fingers.

2. 2

   Break the koji

   Put the rice koji in a wide bowl and crumble it gently until no hard clumps remain. This is not ceremony. Breaking it up spreads the koji evenly through the bed, so every handful seasons the same way.

3. 3

   Mix the bed

   Add the salt to the koji and rub them together, then fold in the warm rice. Work with clean hands until the mixture feels evenly damp and heavy, like coarse miso before it has settled. If it feels dry and sandy, add lukewarm water a spoonful at a time. Too much water makes a loose bed, and a loose bed spoils more easily.

4. 4

   Pack and rest

   Pack the mixture into a clean ceramic crock, glass jar, or enamel container, pressing out air pockets as you go. Slip in the konbu if using. Cover the surface with clean parchment or plastic wrap pressed directly against it, then set on a lid. Leave at cool room temperature for 24 hours so the salt can draw moisture through the rice and koji.

   Pressing the cover directly on the surface keeps air away from the bed. Air dries the top and invites stray molds, which have no business at this table.
5. 5

   Turn the doko

   After the first day, stir the bed from bottom to top with a clean spoon or hand. It should smell gently sweet, salty, and rice-like, never sharp or rotten. Move it to the refrigerator for slower keeping, or keep it in a very cool place if your kitchen is winter-cold.

6. 6

   Bury the vegetables

   Wash the vegetables, dry them well, and cut them into pieces the seasoning can reach: cucumber halves, daikon sticks, carrot batons, or small turnips split in two. Bury them completely in the bed. Thin cucumber may be ready in 6 to 12 hours, while daikon and carrot usually need 1 to 2 days. Salt pulls water from the vegetable while koji rounds the edge, so the pickle becomes seasoned inside, not merely coated.

7. 7

   Wipe and serve

   Lift out only what you plan to serve, wipe off the clinging doko, and slice neatly. Do not rinse unless the pickle tastes too salty, because rinsing washes away the koji fragrance you waited for. Arrange a few pieces in a small dish with room around them. Pickles are a companion to rice, not a mountain to climb.

Chef Tips

• •Use fresh rice koji if you can find it. Dried koji works, but hydrate it according to the package before mixing, or it will pull too much moisture from the bed at the start.
• •The older three-five-eight ratio is salty by design. It preserves well and seasons firmly. If you reduce the salt for a modern, milder bed, keep it refrigerated and use it sooner.
• •Dry the vegetables before burying them. Extra surface water thins the bed and dulls the seasoning.
• •If the bed smells cleanly sweet and salty, it is behaving. If it smells rotten, alcoholic in a harsh way, or grows colored mold, discard it. Honmono doesn't ask you to gamble.

Advance Preparation

• •The doko should rest at least 24 hours before its first use, and it becomes rounder after 2 to 3 days in the refrigerator.
• •Keep the bed refrigerated after the first rest, stir it every few days, and remove any excess liquid if it becomes soupy.
• •A well-kept salty bed can be used repeatedly for several weeks. Add a small handful of koji and a pinch of salt when it begins to taste thin.

Frequently Asked Questions

Nutrition Information

1 serving (about 30g)