Umeboshi are Japanese salt-preserved plums, known for their bright tartness, intense saltiness, and deep savory flavor. They are often eaten with rice, tucked into onigiri rice balls, or used as a punchy seasoning in dressings, sauces, and marinades.
This recipe uses only ripe ume plums and sea salt. No vinegar, sugar, additives, or preservatives are needed. The result is a traditional, very salty umeboshi that can be stored at room temperature when made correctly.
What You’ll Need
- 2.2 lb ripe yellow ume plums
- 7 oz coarse sea salt
This is 20% of the weight of the plums. - A clean glass jar or food-safe container
- Paper towels or a clean kitchen towel
If you can find organic ume, use them. Umeboshi are eaten with the skin on, so fruit grown without synthetic pesticides is ideal. In the U.S., fresh ume may be available seasonally at Japanese grocery stores, specialty Asian markets, farmers markets, or online farms.
Choosing the Right Ume
Use fully ripe yellow ume for soft, tender umeboshi. Green ume will produce a firmer, sharper result and are better suited for syrup or plum wine.
Small blemishes or spots are normal, especially on organically grown fruit. Avoid fruit with mold, deep bruises, or broken skin.
Step 1: Wash and Dry
Gently rinse the ripe ume under running water. Remove any stems with a toothpick or skewer.
Dry each plum thoroughly. Moisture left on the fruit or in the jar can lead to mold, so take your time here.
Step 2: Layer with Salt
Place a little salt in the bottom of the clean jar. Add a layer of ume, then another layer of salt. Continue alternating ume and salt until everything is in the jar.
Use coarse sea salt if possible. It blends well with the fruit and is traditional for this style of preserving.
Step 3: Let the Ume Brine
Seal the jar and keep it in a cool, dark place. Within 2 to 3 days, liquid will begin to draw out of the plums. This liquid is umezu, or plum vinegar/brine.
Shake or gently rotate the jar a few times a day so the salt and plums stay evenly distributed. Let the ume sit for about one month.
Step 4: Dry the Ume
After about a month, remove the plums from the brine and lay them out carefully to dry.
For beginners, shade-drying is easier than direct sun-drying because ripe ume are delicate and can dry too quickly. Dry one side for about a day, then turn them over and dry the other side. The process usually takes 2 to 3 days.
Step 5: Store
Once both sides are dried, transfer the umeboshi to a clean storage container. Handle them gently because ripe umeboshi can be very soft.
Because this version uses 20% salt, it is intentionally very salty and made for traditional preservation. Salt crystals may appear on the surface; that is normal.
How to Use Umeboshi
Try a small piece with steamed rice, chop it into salad dressing, mix it into sauces, or use it anywhere you want a bold salty-sour flavor. A little goes a long way.
Note for U.S. readers: This is a traditional high-salt preserved food. If you are reducing sodium, use umeboshi sparingly or consult a lower-sodium recipe designed for refrigerated storage.
