Antique Katana Price Guide 2026: Prices by Period and Papers

An antique katana with NBTHK Hozon or Tokubetsu Hozon papers costs between $5,155 and $13,902 at specialist dealers (median by period), and Juyo-level blades start at a median of $31,595. The exact figure depends on four things you can read on a listing: the period, the paper level, the signature and the blade length.

This guide gives the price for each of those combinations from the Tokyo Nihonto Market Index 2026, a dataset of 1,625 priced listings from 25 specialist dealers in Japan, North America and Europe, collected in October 2026. Of those, 568 are katana from the three antique periods: Koto, Shinto and Shinshinto. Every figure below is an asking price displayed by a dealer, not a transaction price, and every cell rests on at least 8 listings. If you only want the short answer to what a real katana costs, including modern handmade blades, read how much a real katana costs.

How much does an antique katana cost in 2026?

According to the Tokyo Nihonto Market Index 2026, specialist dealers list an antique katana with NBTHK Hozon papers at a median of $5,155 (Shinshinto) to $5,952 (Koto), with Tokubetsu Hozon papers at $9,478 (Shinto) to $13,902 (Koto), and with Juyo papers at $31,595 (Koto) to $47,392 (Shinto).

The table lists every katana cell in the index. The "middle half" column brackets the central half of the listings: a quarter of the blades in a cell are listed below the first figure and a quarter above the second. That band is wide, often close to a factor of 2, because the index cannot see the smith's rank, the polish or the mountings.

NTHK is the other Japanese certifying society. Its papers appear almost only with Western dealers, so read those rows as a Western price level, not as a verdict on the paper. No Tokubetsu Juyo katana in the sample carried a public price: at that level, dealers sell on request.

Which period costs the most? Koto vs Shinto vs Shinshinto prices

In the Tokyo Nihonto Market Index 2026, Koto katana (before 1596) have the highest median asking price at $9,600, followed by Shinshinto at $9,489 and Shinto at $8,239, all papers combined. At equal papers, signature and dealer region, a Koto katana lists at only 1.23 times a Shinto one.

The raw medians and the period effect tell different stories, and the second one is the useful one. Raw medians mix paper levels. Shinshinto katana in the sample carry Tokubetsu Hozon papers more often than Shinto katana, which pushes their raw median up. Once papers are held equal, Shinshinto sits at x1.04 against Shinto, so the two periods are priced almost the same. Koto keeps a real premium (x1.23), and Gendaito blades sit at a discount (x0.88).

Many searches ask about Kamakura katana prices. The index groups all blades made before 1596 as Koto and does not split Kamakura from Muromachi work, so it cannot give a separate Kamakura median. What it shows is the top of the Koto market: Juyo Koto tachi, the long blades worn edge-down that include much of the surviving Kamakura work, are listed at a median of $88,465 (N = 11). For what each era offers at a given budget, see our nihonto periods budget guide.

How much do NBTHK papers add to an antique katana's price?

The Tokyo Nihonto Market Index 2026 finds that NBTHK Tokubetsu Hozon papers roughly double the asking price of an antique katana compared with Hozon papers (x2.09 at equal period, signature and region), and Juyo papers multiply the Hozon price by about 8.6. Hozon papers alone do not lift a katana above blades whose papers are not stated.

The Tokubetsu Hozon premium is the steadiest result in the index: x1.69 to x2.39 across the three antique katana periods. Juyo is a separate market. It lists at 2.27 to 5.00 times Tokubetsu Hozon, and almost every priced Juyo blade comes from a dealer in Japan.

The Hozon result surprises most buyers. A Koto or Shinto katana with Hozon papers is listed below the group of katana whose papers are not stated (x0.78 and x0.72). That group is mostly Western, where asking prices run higher, so it is not a cheap baseline. A katana listed as explicitly unpapered is a different case: it lists at x0.63 against Hozon. In practice, treat Hozon as the minimum documentation for an antique katana, not as a premium. Our NBTHK certificate guide explains what each paper certifies.

Is a signed katana worth more than a mumei (unsigned) one?

According to the Tokyo Nihonto Market Index 2026, an unsigned (mumei) katana is listed at about 0.80 times a signed katana with the same period, papers and dealer region. The gap is irregular: across 5 katana cells the signed to mumei ratio runs from 0.77 to 1.81, and in one cell mumei blades are listed higher.

The clearest signature premium is at the top: Koto Juyo katana with a signature list at 1.81 times mumei ones, because a signed Juyo Koto blade is rare. At Tokubetsu Hozon level the gap almost disappears (x1.05 for Koto). A mumei Koto blade is often an old blade that was shortened (o-suriage) and lost its signature in the process, and NBTHK judges still attribute it to a school and period from the steel and the temper line. A strong attribution on the paper can carry as much weight as a signature, and it carries no forged-signature risk. Signed blades by famous names do: read how to spot a gimei before paying for a name, and our mumei nihonto buyer's guide before passing on an unsigned blade.

Does blade length change an antique katana's price?

Blade length matters at Tokubetsu Hozon level. In the Tokyo Nihonto Market Index 2026, Tokubetsu Hozon katana with a 70 to 74 cm blade are listed at a median of $13,902, against $9,162 for 66 to 70 cm, a 52% premium. At Hozon level the same step adds only 20%.

Longer blades in good condition are rarer, because many Koto katana were shortened over the centuries. Above 74 cm the premium shrinks again, as the cells mix very long blades of uneven quality.

What antique katana can you buy under $5,952?

Below the Koto Hozon median of $5,952, the Tokyo Nihonto Market Index 2026 still shows a real market for papered antique katana: a quarter of Hozon Shinshinto katana are listed below $3,665, a quarter of Hozon Shinto katana below $3,750, and a quarter of Hozon Koto katana below $4,154.

Those lower-quartile blades are usually honest pieces with a modest smith, a tired polish or plain mountings. They are the best entry point if you want a papered antique katana rather than a name. Two other routes give more blade for the money:

• A shorter blade with the same papers. Hozon Shinto wakizashi are listed at a median of $2,907 and Hozon Shinshinto tanto at $2,401. See our wakizashi buyer's guide and tanto buyer's guide.
• A Gendaito katana. Traditionally forged blades from 1876 to 1945 with Hozon papers are listed at a median of $4,200. They are not antiques in the strict sense, but they are real nihonto.

Our best-value guide for new collectors goes through what to look for at this level.

Why very cheap "antique katana" listings are rarely antique nihonto

Very cheap "antique katana" on general marketplaces such as eBay and Etsy are rarely papered nihonto, because the Tokyo Nihonto Market Index 2026 finds that, in every antique period, three quarters of katana with NBTHK Hozon papers are listed above $3,665 at specialist dealers. A papered listing far below that level needs an explanation.

The usual explanations are not good ones: a replica or iaito sold as antique, a machine-made blade, a blade with fatal flaws, or a paper that belongs to another sword. The index itself excludes replicas, iaito and industrial blades, so its prices only describe real, traditionally forged blades. A low price can also be honest when a blade has no papers and real condition issues, but then you carry the authentication risk yourself. Before buying from a general marketplace, read the red flags of fake antique katana.

Worked example: is this antique katana fairly priced?

To check an antique katana price with the Tokyo Nihonto Market Index 2026, find the cell matching its period and papers, then see where the asking price falls against the middle half of that cell. Between the 25th and 75th percentiles is normal; outside that band, ask why.

Take a hypothetical Shinto katana with Tokubetsu Hozon papers, signed, 71 cm, offered by a Western dealer:

1. Cell: Shinto, Tokubetsu Hozon. Median $9,478, middle half $6,730 to $15,221 (N = 96).
2. Length: 70 to 74 cm is the best-priced band at Tokubetsu Hozon level ($13,902), so an asking price in the upper half of the cell is defensible.
3. Dealer region: on this exact profile, Western dealers list at a median of $12,520 and dealers in Japan at $8,531 (x1.47). An asking price near $12,520 is normal for a Western dealer; the same price from a dealer in Japan would sit high.
4. Above $15,221: expect a reason, such as a highly ranked smith, a sayagaki, a fresh polish or fine mountings.

Across the 5 katana profiles where both sides have at least 8 listings, Western dealers ask 1.29 to 1.94 times what dealers in Japan ask. Shipping, export paperwork and after-sale support explain part of that gap. The full index has the same comparison for wakizashi and tanto, and our article on what makes a Japanese sword valuable covers the factors a price table cannot see.

Every antique katana in our authentic Japanese katana collection is listed with its period, papers and blade length, so you can place it in the table above yourself.

Frequently asked questions

Key takeaways

• An antique katana with Hozon papers lists at a median of $5,155 to $5,952; Tokubetsu Hozon at $9,478 to $13,902; Juyo at $31,595 to $47,392 (Tokyo Nihonto Market Index 2026).
• Papers are the biggest price driver: Tokubetsu Hozon is about x2.09 Hozon, Juyo about x8.6.
• Period matters less than expected once papers are equal: Koto x1.23, Shinshinto x1.04 against Shinto.
• A signature is not automatically worth more: mumei katana list at x0.80 on average, with wide variation.
• Long blades (70 to 74 cm) carry a 52% premium at Tokubetsu Hozon level.
• Western dealers ask 1.29 to 1.94 times what dealers in Japan ask for the same katana profile.
• All figures are asking prices. Check the method and limits of the index before quoting them.

How these figures were produced: Tokyo Nihonto Market Index 2026 (edition 2026-10), 1,625 priced listings from 25 specialist dealers, collected 11 October 2026, converted to US dollars at the European Central Bank reference rate of 2026-10-09. Cells with fewer than 8 listings are not published. Dealers are not named.