Nikiri Soy (Heated Soy to Mirin Reduction)

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Soy sauce (koikuchi shoyu) — Standard dark soy; high-quality marudaizu (whole-bean) soy adds complexity — do not use tamari, which is too thick

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Mirin (hon-mirin) — True hon-mirin only; mirin-fumi (mirin-style condiment) contains salt and will over-season the reduction

Combine soy sauce and mirin in a small saucepan. Bring to a gentle simmer over medium-low heat. Cook, stirring occasionally, for 3–5 minutes until alcohol has fully cooked off — test by waving a lit match over the surface; no flame should catch. The liquid will reduce by roughly 10–15%, deepen in color, and coat a spoon lightly. Cool to room temperature. Apply with a fine pastry brush or traditional hake brush to the top surface of formed nigiri just before serving.

• Alcohol removal is the critical step — residual alcohol produces a sharp, raw mirin note that clashes with delicate seafood
• Cool completely before brushing; warm nikiri will partially cook the fish surface on contact
• Store in a sealed bottle at room temperature; nikiri keeps for several weeks and actually mellows and improves over the first few days
• Apply sparingly — one thin, even coat is all that is needed; pooling creates an overly salty bite
• The 4:1 ratio leans savory; chefs working with naturally fatty fish (otoro, salmon) sometimes shade toward 3:1 for a touch more sweetness to balance richness

• Tsume (eel glaze)

  A heavier, longer reduction of soy, mirin, and sometimes dashi/sugar specifically applied to anago and unagi; thicker and sweeter than standard nikiri

• Dashi-extended nikiri

  Some chefs add a splash of ichiban dashi to the base for lighter, more nuanced seasoning — common in Kyoto-influenced styles

• White soy (shiro shoyu) nikiri

  Substituting shiro shoyu for koikuchi yields a pale amber glaze used on white-fleshed fish such as hirame or tai where color neutrality matters

• Ponzu nikiri

  A citrus-forward riff adding yuzu juice to the finished reduction; used on richer fish like salmon or buri

• Sushizu (Rice Vinegar to Sugar to Salt)

  Seasons the shari that is formed beneath the fish nikiri will glaze

• Tosa Dashi (Dashi to Soy to Mirin)

  Shares mirin and soy as foundational components at a broader dashi scale

• Teriyaki Glaze

  Similar soy-mirin reduction logic but reduced further and often with added sugar for thicker coating on grilled proteins

1. 1.Sushi: Taste and Techniques — Kimiko Barber & Hiroki Takemura
2. 2.The Japanese Kitchen — Hiroko Shimbo
3. 3.Jiro Dreams of Sushi (documentary, 2011) — David Gelb
4. 4.Sushi Chef: Sukiyabashi Jiro — Jiro Ono & Masuhiro Yamamoto

Confidence: high