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Japanese · Japan

Japanese Mizuyokan Water Yokan Summer Confection and Heat Tolerance

Mizuyokan (water yokan, literally 'water sweet bean jelly') is the summer variant of the yokan red bean jelly family — a preparation that uses a higher water ratio than standard neri-yokan (firm boiled yokan) to produce a softer, more fluid jelly specifically optimised for summer consumption. Where neri-yokan has a firm, almost fudge-like texture achieved through extended boiling to concentrate and set the agar-azuki mixture, mizuyokan achieves a tender, almost trembling set through higher hydration and minimal boiling, producing a confection that literally melts on the tongue and provides a cooling sensation that makes it one of Japan's quintessential summer foods. The agar concentration in mizuyokan is precisely calibrated to the desired set: too little and the jelly won't hold its shape when sliced; too much produces a rubbery texture that misses the delicate trembling quality. Classic mizuyokan flavours: koshi-an (smooth red bean paste), matcha, kuri (chestnut), and white bean (shiro-an) — each producing the same transparent softness with different flavour. Tin-packed mizuyokan from Fukusaya (Tokyo confectioner) and similar premium producers is a national gift-giving institution for summer — the tin package design has remained essentially unchanged for decades and functions as a recognisable Japanese summer luxury. Mizuyokan's heat tolerance depends on its sugar concentration: traditional mizuyokan with sufficient sugar content can be stored at room temperature for weeks to months (the high osmotic pressure from sugar inhibits bacterial growth); reduced-sugar modern varieties require refrigeration and have shorter shelf life.

‹Swipe for the next dish›
ServesAbout 8 slices (one standard block mould)
Sourced0of 5 in BC
Cook
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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 ml
water
Your own market
2 g
agar powder
Not yet stocked in British Columbia
150 g
koshi-an (smooth red bean paste)
fully strained to a smooth, lump-free paste
Not yet stocked in British Columbia
80 g
white sugar
Your own market
1 pinch
fine salt
Your own market
II

The Method

1
Combine the agar powder with the 300 ml of cold water in a small saucepan. Stir briefly to disperse the powder. Place over medium heat and bring to a full boil, stirring constantly. Maintain a rolling boil for 2–3 minutes, continuing to stir, until the liquid is entirely clear and no undissolved agar granules remain. The liquid should be transparent and slightly viscous; any remaining cloudiness indicates under-activated agar.
2
Remove the pan from the heat. Add the sugar and the pinch of salt; stir until both are fully dissolved. Allow the mixture to cool, without refrigeration, until it reads approximately 70°C — the surface will have ceased active steaming and the liquid will feel distinctly hot but no longer scalding when a clean finger is passed briefly near it.
3
This is where the dish lives or dies. Add the koshi-an to the agar base and stir with a flexible spatula until the paste is completely incorporated and the mixture is perfectly smooth and uniform in colour. Any residual lumpiness or streaking will set permanently into the finished jelly. The paste must be added at this temperature — no higher — to prevent protein denaturing in the bean paste, which would introduce a gritty texture irrecoverable in later steps.
4
Rinse the mould with cold water; do not dry it. Continue to allow the mixture to cool, stirring gently, until it reaches approximately 60°C. Pour into the wetted mould in a single, steady motion. The surface should be smooth and level; any surface skin that forms indicates the mixture was poured too hot.
5
Leave the mould at room temperature, undisturbed, for a minimum of 3–4 hours. The jelly will firm progressively; the edges will pull very slightly from the mould sides and the surface will no longer ripple when the mould is nudged. Transfer to the refrigerator for a further 1 hour minimum. Do not refrigerate while the jelly is still warm — condensation will form and the set will be irregular.
6
To unmould, run a thin blade dampened with cold water around the interior edge of the mould and invert onto a clean board. To slice, rinse the blade in cold water, wipe to remove excess, and cut sections 1.5–2 cm thick in a single drawing motion. The wet blade glides through the tender gel without compressing or tearing; a clean edge and a slightly trembling, intact slice confirm correct set.
III

Quality Hierarchy

01
Reserve — Tin-packed mizuyokan from a Meiji-era Tokyo confectioner such as Fukusaya, whose block design has remained unchanged since 1894 — the benchmark of the shelf-stable, high-sugar traditional form and a recognised national gift-giving standard.
02
Estate — Mizuyokan made with premium artisan koshi-an from a specialist wagashi supplier, fully strained and smooth, paired with high-clarity agar powder; produces the characteristic semi-translucent appearance and delicate trembling set of the finest home preparation.
03
Market — Standard commercially available koshi-an (tinned or vacuum-packed) with food-grade agar powder; yields a reliable, well-flavoured mizuyokan suitable for everyday summer service, provided straining is thorough.
04
House — Reduced-sugar mizuyokan made with any smooth bean paste to hand — a fresher, lighter flavour, but requiring refrigeration throughout and consumption within 3–5 days; structurally correct if the agar ratio is observed.
IV

Sensory Tests

◇Sight. The boiling agar-water mixture turns from cloudy to fully transparent — the signal that the polysaccharide gelling network is activated.
◇Sight. The koshi-an-agar mixture is uniform in colour with no streaking or lumps after incorporation — any variation will set permanently.
◇Sight. The poured surface is smooth and skin-free; a skin indicates the mixture was too hot when poured.
◇Touch. The set block no longer ripples when the mould is nudged and the edges show slight retraction — the jelly is ready for refrigeration.
◇Touch. A sliced section trembles on the plate but holds its rectangular form without slumping — correct agar ratio and set achieved.
◇Where it lives or dies. The koshi-an must be incorporated into the agar base at precisely the right temperature — too hot and the bean paste proteins denature to a permanent grittiness; too cool and the agar begins to set before the paste is evenly distributed.
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VI

What to Pour

The pairing
The Yamazaki 12 Year Old Single Malt
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Whisky
From British Columbia

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The whole pairing
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