August 20, 2026
What Does Full Tang Mean on a Katana? How to Check the Claim
Full tang describes how far the blade’s tang extends inside the handle. Learn what the term tells you, what it does not prove, and how Prime Katana documents it.
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Katana Guides
Evidence-led guides to steel, edge state, dimensions, fittings, care, and collection.
August 20, 2026
Real Hamon vs. Polished Temper Line: What Is the Difference?
A real hamon is associated with differential hardening. A polished temper line is a visual finishing effect. Learn how Prime Katana labels both.
Read guideAugust 20, 2026
What Is Kobuse Jigane? A Collector’s Guide to the Term
Kobuse is a laminated blade-construction term, not a steel grade or automatic proof of quality. Learn what it means—and what Prime Katana does not claim.
Read guideAugust 20, 2026
Choosing an Unsharpened Collector Katana: How Edge State Is Declared
Every Prime Katana listing is supplied unsharpened for adult collection and display. Learn which edge-state and specification fields to verify before buying.
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