Kohakuto vs Pururun Jewel Jelly: Japan's Crystal Candy, the Kit Version
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Kohakuto is the Japanese sweet that looks like a handful of raw crystals — crisp on the outside, soft jelly inside, and all over social media as "crystal candy". Pururun Jewel Jelly is the children's kit that makes gemstones out of jelly. They look like cousins. They are not the same thing, and knowing the difference tells you which one you actually want.
The short version: Kohakuto is a traditional sweet you make at the stove and then leave to dry for days — that drying is what gives it the crunch. Pururun Jewel Jelly is a no-heat kit you finish in one sitting. It gives you the gemstone look, with a soft bite and no crunch.
What Kohakuto Is
Kohakuto (琥珀糖, "amber sugar") is a wagashi — a traditional Japanese confection. It is made from kanten (agar), sugar and water, boiled together, coloured, and left to set. The set jelly is then cut or torn into rough pieces and left out to dry.
The drying is the whole trick. Over several days, the sugar on the surface crystallises into a thin, frosted shell, while the inside stays soft. That is the sound people film: a crisp crack, then a soft centre. The name comes from the amber colour of the early versions; today it is made in every colour you can think of.
If you want the wider picture of where sweets like this fit in Japan, our guide to wagashi, Japan's traditional sweets covers it.
What Pururun Jewel Jelly Is
Pururun Jewel Jelly is a chiiku-gashi — one of Japan's DIY candy kits for children, made by Kracie. You mix four colour bases (red, blue, yellow and white), swirl them, pour them into faceted gem moulds and let them set. It needs water and nothing else: no stove, no microwave.
What comes out are glossy gems with sharp facets, and one of them can be mounted on the paper ring sheet in the box and worn. Then you eat them.
Side by Side
Crunchy outside, soft inside
The crunch only exists because of the days of drying. Rough, frosted, hand-cut shapes.
Soft and glossy all the way through
No drying step, so no sugar shell. Smooth, faceted shapes from a mould.
A stove and several days
Boiling sugar syrup — an adult job — then a long wait before you can eat it.
Water and one sitting
No heat at all, so a child can do every step. The only wait is the setting time printed on the box.
Any amount, any colour
You choose the batch size and the colours, and you need to buy agar and colouring.
One small batch, everything in the box
15 g of candy, four colours to mix, moulds and a ring sheet included.
Which One You Want
A quick way to decide
- You want the crunch. Make kohakuto. Nothing in a kit will give you that sugar shell, because the shell is made by time.
- You want a child to make it. Jewel Jelly. No boiling syrup, and it is done before anyone loses interest.
- You want the gemstone look today. Jewel Jelly. The faceted moulds give sharper "cut stone" shapes than hand-cut kohakuto.
- You want something to give or keep. Kohakuto, once it has dried, keeps far better than fresh jelly does.
It is tempting to leave Jewel Jelly gems out to dry and see if they go crunchy like kohakuto. The kit is not designed for that, and we haven't tested it, so we can't tell you it works or that it is safe to eat afterwards. Eat the gems the way the box says.
Getting Jewel Jelly to Look Like Crystal Candy
The gems that look most like kohakuto are the ones with colour moving through them rather than one flat colour. A few things make the difference:
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Under-mix the colours
Two or three passes with the stick, then pour. Keep stirring and the colours blend into one, and the gem loses its depth.
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Use the white for a frosted look
Kohakuto is milky on the outside. A little white mixed in turns a clear gem cloudy and gets you closer to that frosted look.
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Tap out the bubbles
Tap the filled mould gently on the table. Trapped air shows up as white flecks in the finished gem.
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Wait the full setting time
The outside sets before the centre. Unmould too early and the gems tear.
The full walkthrough, step by step, is in our Pururun Jewel Jelly English instructions.
Common Questions
Is Pururun Jewel Jelly a kohakuto kit?
No. It makes gem-shaped jelly candy, but it has no drying step and no sugar shell, so it doesn't have the kohakuto crunch. It is the kit to buy for the gemstone look, not for the texture.
Does it need a microwave?
No. It uses water only, with no heat at any stage.
What about allergens?
Kracie declares none of Japan's designated allergens for this kit, and it is made in a facility that also handles wheat, egg and milk. Always check the printed pack, which is the definitive source.
Is there a Japanese kit for traditional sweets?
Yes — Meiji's Wagashiya-san makes wagashi-style sweets. See our Wagashiya-san English instructions.
Kracie has retired Pururun Jewel Jelly from its range, so the kits we have are the ones left. Every kit we send is the Japanese retail product, with Japanese packaging — which is why we publish English instructions here on our site.