Shirako Cod Milt Japanese Delicacy
Japan (nationwide; particularly Hokkaido and Tohoku for madara; fugu shirako from Yamaguchi)
Shirako (白子, literally 'white children') refers to the sperm sac (milt) of male cod (tara), typically madara (Pacific cod) or true cod, and is one of Japan's most prized and culturally distinctive winter delicacies. The texture is extraordinarily creamy and custardy — almost liquid in the centre — with a mild, clean, oceanic sweetness and none of the bitterness associated with liver or other offal. Peak season runs from November through February, when milt sacs are at maximum size and fat content. Shirako is prepared by careful rinsing in cold salted water, removing the connecting membrane (yakumi), then either poached gently in dashi (yudōfu-style), served raw as sashimi with ponzu and momiji-oroshi (grated daikon with chilli), deep-fried in a light tempura batter, or grilled briefly under a broiler. Chawan-mushi steamed with shirako produces a particularly delicate preparation. At sushi counters, shirako gunkanmaki (battleship roll) or nigiri is a seasonal highlight. Regional variants include ankimo (monkfish liver, sometimes confused with shirako) and fugu shirako from puffer fish — considered the ultimate expression. The product requires careful handling — shirako perishes quickly and must be consumed within 24 hours of purchase.