Kasugo-dai (春子鯛), or baby sea bream, is the young form of madai in Edomae sushi, valued for its fine texture, delicate flavor, and restrained elegance. While mature madai is often appreciated for its firmness and depth, kasugo-dai leans toward something lighter, clearer, and more subtle, requiring a more measured approach in order to preserve its character.
At SABI Sky Omakase in Ho Chi Minh City, kasugo-dai is dry-aged for 48 hours. This short dry-aging process removes excess moisture, refines the structure of the flesh, and concentrates the fish’s natural sweetness. With an ingredient as delicate as kasugo-dai, dry-aging is not used to intensify aggressively, but to bring the flavor into sharper focus — more composed, more defined, and easier to perceive.
The nigiri is finished with scallion and fresh ginger grated by hand using a Japanese Touki Oroshi grater, along with moshio seaweed salt and goma abura sesame oil. The scallion adds freshness and a gentle green lift, while the grated ginger brings warmth and brightness to the finish. Compared to sliced or minced ginger, hand-grated ginger offers a finer texture and a softer aromatic release, blending more seamlessly into the composition.
The moshio contributes a rounded salinity with a faint mineral depth from the seaweed, distinct from the sharper edge of regular salt. Meanwhile, the goma abura introduces a very light aromatic layer — just enough to connect the delicacy of the fish with the toppings above, without weighing down the overall profile.
What defines this nigiri is not a single dominant note, but the way each small element supports the others. From the refined structure created through 48 hours of dry-aging, to the preserved sweetness of the baby sea bream, and the layered accents of scallion, ginger, moshio, and sesame oil, the composition remains light, fragrant, and quietly dimensional.