Ponzu
What it is
A tart, citrusy Japanese sauce of soy and sour citrus juice, used as a bright dipping sauce and dressing. Thin, translucent brown, intensely savory-sour.
How it's made
Ponzu proper is citrus juice seasoned with vinegar; the ubiquitous ponzu shoyu adds soy sauce, plus mirin, dashi, and often a kombu/bonito steep. The citrus is traditionally a Japanese sour variety, never lemon or lime.
Flavor profile
Sharp citrus acidity married to salty umami soy and a whisper of sweetness; refreshing and palate-cleansing.
Culinary uses
Dipping sauce for shabu-shabu, sashimi, and gyoza; dressing for cold tofu, grilled fish, and salads; a finishing splash. Pairs with seafood, hot-pot meats, tofu, daikon.
Regional variations
The citrus base defines character: yuzu (floral, the most prized), sudachi (sharp, green, herbal, Tokushima), kabosu (rounder, Oita), and the less aromatic daidai. Each yields a distinct ponzu.
Cultural & historical context
The name likely derives from Dutch pons (a citrus punch), entering Japanese during the Dutch trading era and acquiring the kanji 酢 ("vinegar") to become ponzu. It exemplifies the Japanese love of sour-citrus accents on rich or raw foods.