Lot Date Cosmetic batch code checker for production date and expiry
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Kose Batch Code Location Guide

Find the right Kose batch code before decoding: check box, bottle, tube crimp, seal, and avoid barcodes, shade numbers, or SKU codes.

Locate the correct Kose batch code before using the checker. Failed lookups often come from entering a barcode, shade reference, or incomplete print instead of the production lot.

Last updated: 2026-09-05

  • Identify the manufacturing lot on the actual Kose product; its length and layout can differ between items.
  • Start with box bottom or bottle base, then confirm another package area if the print is faint.
  • Use one complete printed string from one location; do not merge box and bottle fragments.

Most likely Kose code locations

For Kose, start with the box bottom. If the outer box is missing, move to the bottle base and then the compact base.

Check the label around each marking to distinguish the production lot from product references; position and character count alone do not identify a lot.

  • Check the box bottom under bright side light.
  • Check the bottle base under bright side light.
  • Check the compact base under bright side light.

Numbers to ignore

Do not enter the retail EAN/UPC product number, shade number, SKU, ingredient registration number, or volume marking as the batch. Some scannable codes contain additional fields; use only an explicitly identified lot field, not the entire scan.

If several Kose codes appear, identify the production lot from its label and the instructions for that product. Length alone cannot identify it. Keep every mark with its original location and never trim a longer identifier to make it fit.

When the print is hard to read

Embossed or low-contrast batch codes are easier to read with side lighting. Take a photo, zoom in, and preserve leading zeroes, separators, and letter case.

If the box and container disagree, check whether one string is a product reference. Preserve both markings separately while confirming their purpose.

Kose product and package context

Inspect bottle and jar bases, tube crimps, pump labels, refill containers, sheet-mask sachet seams, and the matching carton for a compact production mark. The JAN barcode, retail item code, 40 mL or 60 mL size, quasi-drug sales name, active-ingredient claim, and KOSÉ corporate mark identify the product but are not its manufacturing batch.

ONE BY KOSÉ currently includes Serum Veil Deep Repair, Serum Shield, Melanoshot, The Wrinkleless, lotions, emulsions, peel serum, masks, regular bottles, large sizes, and replacement refills. A refill is filled separately from its reusable holder, and a kit can combine several runs. Functional foods and supplements sold through Maison KOSÉ must follow their printed date and label rather than cosmetic after-opening guidance.