What Is Hozon? 保存 — The Entry Tier of NBTHK Sword Papers

Hozon (保存) — formally Hozon Token (保存刀剣, "sword worthy of preservation") — is the entry-tier authentication paper issued by the NBTHK, Japan's leading sword-appraisal body, confirming that a blade is a genuine, correctly attributed Japanese sword worth preserving. A Hozon certificate does not mean "ordinary": it means the blade has passed formal expert examination (kantei), that its signature is judged authentic (or, if unsigned, that its attribution is sound), and that it is free of fatal flaws. It is the first and most common rung on the NBTHK certification ladder, and for most buyers it is the baseline proof of authenticity to look for.

For a collector, papers are the difference between a sword you can trust and value and one you are guessing about. Hozon is where authentication begins — it verifies the mei and attribution — and everything above it (Tokubetsu Hozon, Jūyō, Tokubetsu Jūyō) builds on that foundation. Understanding what Hozon certifies, and what it does not, protects your money.

What a Hozon certificate actually confirms

The NBTHK (Nihon Bijutsu Token Hozon Kyokai) issues Hozon Token papers after a panel examines the blade in hand. The certificate confirms:

  • Authenticity as nihonto — the blade is a genuine traditionally made Japanese sword, not a fake, cast, or non-Japanese piece.
  • The signature (mei) — if signed, the mei is judged genuine (shoshin); if the paper attributes the blade to a smith or school without a signature (mumei), that attribution is the NBTHK's expert opinion.
  • No fatal flaws — the blade is sound enough to be worth preserving (no disqualifying fatal cracks or unrecoverable damage).

The judgment rests on formal kantei — reading the sugata, hamon, hada, and tang. To see how attributions map to smiths and periods, our Swordsmith & Mei Index is a useful companion.

The full NBTHK ladder

Modern NBTHK papers form a four-step hierarchy. Each higher tier is rarer, harder to earn, and a larger multiplier on value:

  • Hozon Token (保存刀剣) — "worthy of preservation." Entry tier. Confirms authenticity and a sound signature/attribution. The baseline every serious blade should have.
  • Tokubetsu Hozon Token (特別保存刀剣) — "especially worthy of preservation." Second tier. For blades of notably superior quality and condition; a meaningful step up in desirability and price.
  • Jūyō Token (重要刀剣) — "important sword." High tier, awarded in periodic sessions to a small fraction of submissions. Far rarer and a major value multiplier. See our dedicated Jūyō page.
  • Tokubetsu Jūyō Token (特別重要刀剣) — "especially important sword." The summit. Reserved for exceptional, often museum-grade blades; exceedingly rare and the highest ordinary certification.

A blade normally earns Hozon first and can be resubmitted upward over time; a Jūyō blade will have passed the lower tiers on the way. Older green-paper (kicho) certificates predate this system and should be treated with caution.

Buyer guidance — why papers matter

  • Buy the paper, not just the blade. An NBTHK Hozon (or higher) certificate is the strongest common proof that a signature and attribution are genuine. Unpapered antique blades carry attribution risk and usually sell at a discount.
  • Match the paper to the sword. Confirm the length, signature, and features on the certificate match the blade in hand; papers travel with the specific sword they describe.
  • Tier drives price. Moving from Hozon to Tokubetsu Hozon to Jūyō can multiply value several times over for the same smith — the certificate tier is part of what you are paying for.
  • Beware forged or mismatched papers. Verify the certificate is a current NBTHK document and, for significant purchases, that it corresponds to the exact blade.

When you buy an authentic katana from us, papers and attribution are stated up front — Hozon is the floor we build on.

Frequently asked questions

What does NBTHK Hozon mean?

Hozon, or Hozon Token, means "sword worthy of preservation" and is the NBTHK's entry-tier certificate. It confirms the blade is a genuine Japanese sword with an authentic signature or a sound attribution and no fatal flaws. It is the baseline authentication most collectors look for.

Is Hozon a good paper to have?

Yes. Hozon is the entry level, but earning it means the blade passed formal NBTHK examination and its signature or attribution is judged genuine. Papered blades are far safer to buy than unpapered ones, and a sword can later be resubmitted for the higher Tokubetsu Hozon, Jūyō, and Tokubetsu Jūyō tiers.

What is the order of NBTHK certificates?

From lowest to highest the NBTHK ladder is Hozon Token, Tokubetsu Hozon Token, Jūyō Token, and Tokubetsu Jūyō Token. Each higher tier is rarer and a larger multiplier on value, and a blade generally earns the lower papers before being submitted for the higher ones.

Does a Hozon paper increase a sword's value?

It does, because it removes the attribution risk that discounts unpapered blades and proves the mei is genuine. The value gain grows sharply as you move up the ladder, so the same smith's work can be worth several times more at Jūyō than at Hozon.

Keep exploring nihonto