Japanese Kakitamajiru: Egg-Drop Soup and the Technology of Hot Broth Handling

Kakitamajiru (egg-drop soup, literally 'beaten egg soup') is one of Japanese home cooking's most technically revealing preparations—a soup that uses only dashi, seasoning, and beaten egg, where every element is reduced to its essential expression and the technique of broth-to-egg relationship is completely transparent. The preparation requires making a perfect ichiban dashi, seasoning it with salt and shoyu, thickening it slightly with katakuriko (potato starch) dissolved in cold water, then slowly streaming beaten egg into the gently simmering broth while stirring in one direction only. The egg hits the hot starch-thickened broth and sets into soft, silky ribbons suspended throughout. The starch is essential—without it, the egg disperses into tiny particles throughout the broth rather than forming ribbons; the thickened broth catches the egg before it fully disperses and encourages ribbon formation. The comparison to Chinese egg-drop soup (蛋花汤) reveals a key Japanese modification: Japanese kakitamajiru uses potato starch rather than corn starch, creating a less glutinous, more transparent thickening that leaves the broth with a softer, cleaner texture. The egg is beaten but not over-beaten—some yellow-white streaks are acceptable and create the characteristic marbled ribbon appearance. Final garnishes: kinome (sansho leaf) in spring, mitsuba in summer, trefoil in autumn, citrus in winter.