Yushimo-zukuri

Yushimo-zukuri (hot-water-scalded preparation) is sashimi whose surface has been set by briefly passing it through boiling water: the water is poured over the fish, or the fish is dipped into it, and the piece is then chilled at once in ice water, leaving the surface whitened like frost while the flesh beneath stays raw.^1, 2 It is the hot-water form within the frost-set sashimi family; the parallel flame-set form is yakishimo (焼霜, flame-seared surface).^2, 3

The fish is prepared as a skin-on fillet, and boiling water is poured over the surface, or the fillet is dipped briefly into it, until the outer layer turns opaque; the piece is then transferred immediately to ice water to arrest the heat.¹ The hot water sets only the surface and the thin layer beneath it, so the flesh underneath remains raw and the result is served as sashimi rather than as a cooked preparation.² The brief scald firms the surface and removes surface slime, blood, and odor while sealing in the umami of the flesh, and it is carried out before the fillet is sliced.^1, 2

In Japanese cookery shimofuri (霜降り, frosting) denotes sashimi whose surface has been whitened by brief heating and rapid chilling, the pale, flecked surface likened to a fall of frost; the term is a contraction of shimofuri-zukuri (霜降造り).^2, 3 The family is divided by heating method: the hot-water form is yushimo (湯霜, hot-water scald), also called yubiki (湯引き, hot-water pass) or yuburi (湯ぶり, hot-water dip), and the flame form is yakishimo.² Yushimo-zukuri is the preparation produced by the hot-water method. When that hot-water treatment is applied to skin-on white fish so the colored skin can be eaten with the flesh, the cut is kawashimo-zukuri (皮霜造り, skin-scald cut); for madai (真鯛, red seabream) specifically, the skin-on hot-water version is also known as matsukawa-zukuri (松皮造り, pine-bark style).^3, 4

The hot-water preparation is attested early. A cookery text of 1643, the Ryōri Monogatari (料理物語), describes the shimofuri sashimi as made with madai, and the fourth volume of the Ryōri Hayashinan (料理早指南) of 1822 describes it more generally: any fish is blanched in hot water, transferred to cold water, and cut as sashimi.³ In the Edo period the skin-on madai version carried its own name, shimofuri-dai (霜降鯛, frost seabream), a preparation now grouped under kawashimo-zukuri and, for madai, called matsukawa-zukuri.³

湯霜 yushimo joins 湯 yu (hot water) and 霜 shimo (frost): the surface whitened by the scalding water is likened to a fall of frost.^2, 3 The final element, 造り zukuri, is the nominalized form of 造る tsukuru (to make, to prepare a cut), voiced from tsukuri to zukuri by rendaku within the compound; it is also written 作り, so the term appears as both 湯霜造り and 湯霜作り.³