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Japanese · Nagoya, Japan

Japanese Uirō Regional Confection and Rice Flour Steaming

Uirō (外郎) is one of Japan's oldest confections — a steamed rice cake made from rice flour (jōshinko), sugar, and water, with the addition of a small proportion of powdered arrowroot (kuzu) or wheat starch for translucency and smoothness. The confection's name traces to a Ming Dynasty Chinese medicine vendor (uyao) who settled in Kamakura in the 14th century; his family later sold a similar steamed confection that became associated with the family name. Uirō is associated strongly with regional identity: Nagoya uirō (made with white rice flour and refined white sugar) is firm and chewy; Kyoto uirō is softer and more yielding; Yamaguchi uirō uses non-glutinous rice for a particularly clean, slightly firmer texture. The confection is steamed in wooden moulds or bamboo containers, then sliced to reveal the characteristic translucent-opaque cross-section. Its flavour is mild — the primary experience is textural: smooth, yielding, firm-chewy. Uirō is coloured and flavoured with matcha, yomogi (mugwort), cinnamon, red bean paste, or cherry blossom to mark seasonal relevance.

ServesFour portions (one standard loaf, eight slices)
Sourced0of 6 in BC
Cook
I

The Market List

The benchmark for each ingredient, and who stocks it near you. Tap a stockist to go straight to the product.

300 g
jōshinko (non-glutinous rice flour)
not shiratamako or mochiko
Not yet stocked in British Columbia
150 g
refined white sugar
Your own market
30 g
kuzu (arrowroot) powder or wheat starch
sifted; either gives translucency and smooth mouthfeel
Not yet stocked in British Columbia
360 ml
water
cold
Your own market
For a matcha variation
10 g
matcha powder
folded into the sugar before mixing to prevent green streaking
Not yet stocked in British Columbia
For a yomogi variation
10 g
yomogi (mugwort) powder
folded into the sugar before mixing
Not yet stocked in British Columbia
II

The Method

1
Where a flavouring such as matcha or yomogi is used, combine it with the measured sugar first and work the two together until the mixture is uniform in colour and no streaks remain. Set aside.
From the canon — Matcha (抹茶) — finely stone-ground powdered green tea from shade-grown tencha leaves — extends far beyond the tea ceremony context into Japanese cooking and c… Matcha — Culinary Applications Beyond the Tea Ceremony (抹茶料理) →
2
Sift the jōshinko and the kuzu or wheat starch into a mixing bowl. Add the sugar (plain, or pre-combined with the flavouring agent) and whisk to distribute. Pour in the cold water in a steady stream, whisking throughout, until the batter is smooth, fluid, and free of lumps.
3
Prepare a wooden mould or bamboo container by lining it lightly with dampened muslin or parchment. Set up a steamer over briskly boiling water. Pour the batter into the prepared mould in one motion. This is where the dish lives or dies: steam over high, sustained heat until the centre is fully set — a skewer inserted at the centre comes out clean — and the surface feels springy rather than yielding when pressed lightly with a fingertip. Insufficient steaming produces a gummy, uncohesive interior that cannot be corrected after the fact.
4
Remove the mould from the steamer. Wrap the uirō immediately in cellophane while still warm to prevent surface drying; a smooth, unmarked surface is part of the visual standard of the confection. Allow to cool completely at room temperature — a minimum of 4 to 6 hours — during which the flavour develops and the texture firms to its characteristic firm-chewy state.
5
Once fully cooled and set, turn the uirō from the mould. Using a sharp, wetted knife, slice cleanly across the loaf to reveal the characteristic translucent-opaque cross-section. Hot or warm uirō tears at the cut; the blade should pass without resistance and the cut face should hold its shape without slumping.
III

Quality Hierarchy

01
Reserve — Yamaguchi-style: non-glutinous rice milled to order from a single variety, giving the cleanest, slightly crispest texture; kuzu from Yoshino province for superior translucency and smoothness.
02
Estate — Nagoya-style standard: high-grade jōshinko with refined white sugar; produces the benchmark firm-chewy result; premium kuzu starch preferred over wheat starch.
03
Market — Commercial jōshinko with wheat starch substituted for kuzu; flavouring with quality matcha or yomogi powder; a sound, honest uirō of everyday standard.
04
House — Any non-glutinous rice flour (verified not mochiko or shiratamako) with wheat starch and plain white sugar; the textural principle is preserved even where premium inputs are unavailable.
IV

Sensory Tests

◇Touch. Surface of the uirō in the mould springs back immediately when pressed lightly with a fingertip — it does not remain indented.
◇Sight. A skewer inserted at the deepest point of the centre withdraws clean, with no wet or opaque batter clinging to it.
◇Sight. The edges of the uirō show a very slight drawing-away from the mould walls, indicating full contraction of the set cake.
◇Sight. The cut face of a fully cooled slice shows the characteristic translucent-opaque cross-section and holds its shape without slumping at the edge.
◇Where it lives or dies. Steam over high, sustained heat until the centre is fully set and the surface springs back under a fingertip — under-steaming produces a gummy interior that cannot be corrected after the fact.
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VI

What to Pour

The pairing
Nikka From The Barrel
Nikka Whisky — Miyagikyo Distillery · Miyagikyo — Nikka Distillery
Not yet stocked in British Columbia
Whisky
From British Columbia

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Without alcohol

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The whole pairing
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