Nukazuke
Japanese pickles made by burying vegetables in nukadoko, a reusable bed of rice bran, salt and water that is turned daily and ripened by lactic and yeast fermentation.
Modern method
Kabocha no nukazuke: pumpkin in a fermented rice-bran bed
Kabocha no nukazuke: Refrigerated commercial fermented bed; use removed portions the same day.
The preserve
Pumpkin really is used for Japanese nukazuke. A 2026 MUJI recipe gives thin raw pumpkin slices an overnight treatment in its ready-fermented refrigerated rice-bran bed. House Foods separately publishes chef Yūki Noda's longer butternut-squash preparation in a homemade bed. Those are two different formats, so their times should not be mixed.
What this record achieves: a small, crunchy pickle from stored winter squash. It is a method of short-term pickling and seasonal use, not a claim that a bowl of squash will keep all winter. Preserve the main harvest by the collection's whole-fruit, drying or freezing methods; make small fresh batches of this pickle as needed.
Ingredients and equipment
Do not replace the ready-fermented bed with dry rice bran and assume it is equivalent. Its composition, acidity, salt and established microbial population are part of the process.
Maintaining the bed
Different commercial beds have different stirring and replenishment requirements. MUJI describes its own product as requiring roughly weekly mixing, while Tokai's traditional instructions recommend more frequent mixing and managing the water released by vegetables. Follow the instructions for the actual bed purchased rather than borrowing the least demanding rule from another product.
Use a fresh, sound piece of pumpkin, not cooked material left warm on a buffet or pieces from a displayed Halloween lantern. Keep the trial small enough to remove and use at its intended stage. Do not regard the taste or smell of a bed as a measurement of the acidity inside the pumpkin. Discard a suspect batch rather than mixing visible spoilage back into it.
No pumpkin-specific long refrigerator life after removal from the bed was found in these sources. The working recommendation here is to remove only what will be used that day. The manufacturer's maturation time describes the intentional refrigerated pickling stage; it is not a promise of weeks or months of finished-product storage.
A related regional tradition
Niigata also has commercial ito-kabocha no kasuzuke, spaghetti squash preserved in sake lees. Its producer describes a refrigerated product, with a stated two-month life. That is useful evidence that squash is used in another Japanese preserving medium; it is not a home recipe or transferable shelf-life guarantee. A separate source-backed home formula was not established in this research.
History
Pumpkin really is used for Japanese nukazuke. A 2026 MUJI recipe gives thin raw pumpkin slices an overnight treatment in its ready-fermented refrigerated rice-bran bed. House Foods separately publishes chef Yūki Noda's longer butternut-squash preparation in a homemade bed. Those are two different formats, so their times should not be mixed.
Ingredients
Scaling: source batch only
Pumpkinsound, edible pumpkin or winter squash; this is a suggested small trial quantity
200 g
Approximate trial quantity.Ready-fermented refrigerated rice-bran bed
Amount not stated
A commercially prepared, mature refrigerated nukadoko bed whose instructions permit vegetables of this kindMethod
Risks and precautions · Standard risk
Incorrect storage process
Refrigerated commercial fermented bed; use removed portions the same day
Hazard sourceRefrigerated commercial fermented bed; use removed portions the same day
Control sourceRefrigerated commercial fermented bed; use removed portions the same day
Do not transfer a canning schedule from a different pumpkin preparation.
- Follow the bed's current package directions for starting, handling and storage. Wash the pumpkin, remove seeds and any unsuitable tough rind, and cut the edible flesh into slices approximately 5 mm thick. Dry the surfaces.
- Bury the slices in the bed so the bran contacts them. Use only as much pumpkin as can be covered without crowding the package.
- Keep refrigerated throughout. For MUJI's named product and thin-slice method, the published starting point is eight hours or longer, according to taste.
- Remove only the amount to be used. Wipe away the bran, rinse briefly and drain. Keep cold until used.
- Use removed, rinsed portions the same day. Keep the bed refrigerated and follow the current package directions for maintaining it; this is a short-term pickle, not winter-long storage of the pumpkin.
Conditions
Temperature controlRefrigerated
Places
Japan
Documented preparation · Country evidenceGeographical association of this documented version, not an asserted origin.
Related
Variants
Equipment
Food thermometer and refrigerator thermometer
A food probe measures the temperature inside food at the probe tip; a refrigerator thermometer measures the cold storage environment. They answer different questions and cannot establish acidity or validate a preservation process.
Nukadoko jar and container
A nukadoko container holds the moist rice-bran bed in which vegetables are repeatedly pickled. Japanese households have maintained these beds in ceramic jars, while contemporary options also include compact ceramic and enamel designs.
Refrigerator used as a produce store
An ordinary household refrigerator used to store selected fresh produce in vented crates or drawers, at low temperature and at a humidity chosen by the drawer. Not every crop benefits from cold.
Read more
After Halloween: how the world saves its pumpkins
A full harvest-to-pantry guide to keeping pumpkins whole, drying and freezing them, and making pickles and sweet preserves around the world—with the exact distinction between tested canning and cold storage.
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Sources
www.muji.comMethod · Context · Handling
MUJI, 2026: refrigerated nukazuke including pumpkinDocumented preparation, regional context or preservation handling, with the limits stated in the text.
Cited in: The preserve; Ingredients and equipment; Maintaining the bed; A related regional tradition
gaban.h-spice.jpMethod · Context · Handling
House Foods/GABAN, Yūki Noda, バターナッツかぼちゃのぬか漬けDocumented preparation, regional context or preservation handling, with the limits stated in the text.
Cited in: The preserve; Ingredients and equipment; Maintaining the bed; A related regional tradition
www.kyuchan.co.jpMethod · Context · Handling
Tokai Pickling, ぬか漬けDocumented preparation, regional context or preservation handling, with the limits stated in the text.
Cited in: The preserve; Ingredients and equipment; Maintaining the bed; A related regional tradition
shop.ng-life.jpMethod · Context · Handling
Niigata Chokusō Keikaku, producer listing for Kawadani Moyori's squash sake-lees pickleDocumented preparation, regional context or preservation handling, with the limits stated in the text.
Cited in: The preserve; Ingredients and equipment; Maintaining the bed; A related regional tradition