Lot DateCosmetic batch code checker for production date and expiry
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Muji Batch Code Location Guide

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

This page focuses on locating the correct Muji batch code before you use the checker. A large share of failed lookups comes from entering the barcode, shade reference, or an incomplete print instead of the real lot code.

Last reviewed: 2026-04-28

  • Muji is usually checked from a short printed batch or lot code.
  • Start with box bottom or product 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 Muji code locations

For Muji, start with the box bottom. If the outer box is missing, move to the product base and then the package seam.

The correct code is usually a compact alphanumeric string printed away from the main barcode and marketing copy.

  • Check the box bottom under bright side light.
  • Check the product base under bright side light.
  • Check the package seam under bright side light.

Numbers to ignore

Do not enter the long barcode number, shade number, SKU, ingredient registration number, or volume marking. Those strings identify the product, not the production batch.

If several Muji codes appear, enter the shortest complete batch-like string first and compare it against the same print on another package area.

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. The actual batch code is usually shorter and less prominent.