1. Jewelry Identifier
  2. Hallmarks
  3. JIS_HALLMARK

* verified hallmark

The JIS_HALLMARK hallmark: meaning, purity & value

Japanese government hallmark issued by the Japan Mint (造幣局, Zōheikyoku). Optional but prestigious; certifies metal purity as stamped. Look for the chrysanthemum-and-balance symbol next to the purity mark. Introduced 1929.

Published May 30, 2026

Quick facts

Metal
verified
Common regions
Japan

Stamps that mean the same thing

This purity may be struck into jewelry as any of: JIS_HALLMARK / 造幣局ホールマーク / Japan Mint Hallmark / HINSHITSU MARK. The mark differs by country and era, but the metal content is identical.

What JIS_HALLMARK tells you

Japanese government hallmark issued by the Japan Mint (造幣局, Zōheikyoku). Optional but prestigious; certifies metal purity as stamped. Look for the chrysanthemum-and-balance symbol next to the purity mark. Introduced 1929.

How to check it yourself

  1. Examine the stamp under a 10× loupe — genuine marks are crisp and evenly struck, not doubled or smeared.
  2. Confirm the mark reads JIS_HALLMARK or an equivalent such as 造幣局ホールマーク.
  3. Photograph it in the Jewelry Identifier app to read the metal, hallmark, and any gemstones from the image.
  4. For a binding result, have an assay office or gemological lab run an XRF purity test.

Sources

  • Japan Mint (Zōheikyoku) public records

* Frequently asked

FAQ

Q. Is JIS_HALLMARK the same as 造幣局ホールマーク?
A. Yes. JIS_HALLMARK, 造幣局ホールマーク, Japan Mint Hallmark, HINSHITSU MARK all denote the same material — verified. Different markets and eras stamp it differently, but the purity is identical.
Q. How do I confirm a JIS_HALLMARK stamp is genuine?
A. Look at the mark under 10× magnification for crisp, even strikes, cross-check the weight-to-volume ratio against the expected density, scan it with the Jewelry Identifier app, and — when it matters — have an XRF test done by an assay office or gemological lab.

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