A sword cuts through bamboo as if it were paper. The blade glitters in the sun, its edge so sharp that it slices through falling silk. In films, the katana effortlessly cleaves other swords. Video games show samurai felling armoured opponents with a single movement. The katana is regarded as the sharpest, strongest, most perfect sword in history.

But is that true?

The truth is more complicated – and more interesting. The katana is neither the “best sword in the world” nor mere Hollywood exaggeration. It is the result of a thousand years of technological adaptation to Japan’s specific conditions: a shortage of iron, mounted tactics, urban duels, social hierarchy. The blade that lies in museums today or is mythologised in action films was for centuries a precise tool for a brutal profession.

The Samurai Museum Berlin houses one of the most extensive samurai collections in Europe – including 48 authentic katana from the Kamakura period (1185–1333) to the Meiji Restoration (1868–1912).

The 3 Biggest Myths about the Katana – What Is Really True?

Pop culture loves the katana. Films, anime and video games have turned the Japanese sword into a super-weapon that ignores physics and metallurgy. Some of these myths are so old that they were already being spread by Western collectors in the 19th century. Others are modern inventions. Here are the three most persistent legends – and what science says about them.

Myth 1: “The katana can cut anything – even other swords”

The myth: In Highlander, katana slice through European longswords like butter. The message: the katana is so superior that even steel is no obstacle.

The reality: The edge of a katana reaches a hardness of 60–62 on the Rockwell scale (HRC). That makes it extremely sharp – but also brittle. A direct impact against hardened steel leads to nicks (ha-gire) or breaks. No sword can “cut through” another, because both are made of similarly hard material. The laws of physics apply in Japan too.

The blade carries this brittleness in its construction: fine lines of martensite, called ashi, run through the hardened zone (yakiba). Markus Sesko, the leading Western expert on Japanese sword terminology, describes their function:

“Ashi were first introduced to straight hamon patterns to limit the maximum size of a lateral crack of the yakiba to the distance between two ashi. In other words, ashi act as ‘crack stopper’.” (Sesko, *Encyclopedia of Japanese Swords*, p. 19)

In other words: the forging technique expects cracks. The ashi limit the damage so that the blade does not break completely. A sword that could “cut anything” would not need these safety mechanisms.

Conclusion: The katana cuts bamboo, straw mats (tatami) and unprotected flesh superbly. Against metal it fails – like any other sword.

Myth 2: “The katana was the main weapon of the samurai”

The myth: The samurai is the man with the sword. Whether in Ghost of Tsushima or in The Last Samurai – the katana is omnipresent, the bow a footnote.

The reality: Until the 16th century, the bow (yumi) was the most important weapon on the battlefield. The sword was a backup weapon and status symbol, not the primary means of combat.

Only when firearms (tanegashima) made mounted tactics obsolete in the mid to late 16th century did the sword gain military importance. In the urban duels of the Edo period it became the dominant tool – but by then there were no more battles.

Conclusion: The samurai was a warrior with many weapons. The katana only became a symbol when peace broke out.

Myth 3: “Japanese steel (tamahagane) is the best in the world”

The myth: Traditional smelting in the tatara furnace produces a mystical “super steel” that is superior to all other metals.

The reality: Tamahagane is the result of a shortage of iron, not of superiority. Although Japan did have mineable iron ore deposits, iron was also obtained from magnetite sand (satetsu) washed out of riverbeds.

The tatara process takes three days and three nights at temperatures between 1,200 and 1,500 degrees Celsius. The yield: about one tonne of raw steel per smelt, of which only a fraction has the quality needed for blades. The carbon content is 1–1.5% – similar to 19th-century European Krupp steel.

Markus Sesko explains the metallurgical reality:

“Gunsui steel is close to tamahagane except for the high manganese content. The name gunsui-tō goes back to the company which produced the steel, the Gunma Suiden Co., Ltd.” (Sesko, *Encyclopedia*, p. 81)

In other words: modern industrial steel (such as gunsui, produced for military swords in the Second World War) achieves similar or better properties than traditional tamahagane. The elaborate smelting was a makeshift solution, not a sign of superiority.

Conclusion: Tamahagane shows the mastery of the technique, not the superiority of the material.

What Is a Katana? Definition and Distinction

The Precise Definition

A katana is a single-edged, curved long sword with a blade length (nagasa) of over 60.6 centimetres – equivalent to 2 shaku in the traditional Japanese system of measurement. The blade is differentially hardened: the edge consists of hard martensite (60–62 HRC), the back of softer pearlite (30–40 HRC). This construction makes the blade both sharp and resistant to breaking.

The decisive feature: the katana is worn edge up in the sash (obi). This manner of wearing (uchigatana style) allows drawing and attacking in a single movement (nukitsuke) – an advantage in urban duels and confined spaces.

The curvature (sori) varies by era, but is typically 1.5 to 2 centimetres on a 70-centimetre blade. It is produced not by mechanical bending, but by differential hardening: the edge contracts more strongly than the back as it cools.

Japanese samurai sword Katana blade from the early Kamakura period (1185–1333), attributed to Kageyasu of Bizen Province. — This katana blade dates to the early Kamakura period (1185–1333) and is attributed to Kageyasu of Bizen Province. From the collection of Samurai Museum Berlin.

Distinction from other Japanese swords

The katana belongs to a family of weapons that are often confused. The distinction is based on length, manner of wearing and era:

Tachi (太刀) – The Predecessor

Era: Heian period (794–1185) to Muromachi period (1392–1573)
Length: 70–90 cm
Manner of wearing: Edge down, suspended from the belt
Signature: On the outer side of the tang (nakago)
Purpose: Weapon for mounted archers

The tachi was the dominant form of sword until warfare shifted from cavalry to infantry combat in the 15th century.

Wakizashi(脇差) – The Short Companion

Length: 30–60 cm (1–2 shaku)
Manner of wearing: Together with the katana as a daishō pair
Purpose: Backup weapon, indoor fighting, seppuku

From the Edo period (1603–1868) onwards, only the samurai class was permitted to wear two swords. The daishō system (大小, “large-small”) became the visible marker of rank.

Japanese wakizashi sword by Tadatsuna, featuring a dragon chasing a jewel engraving, Buddhist symbols and decorative carvings, mounted in shirasaya and koshirae. — Wakizashi by Awataguchi Tadatsuna, dating to the Genroku period (1688–1704). From the collection of Samurai Museum Berlin.

Tantō(短刀) – The Dagger

Length: Under 30 cm
Purpose: Close combat, coup de grâce, ritual suicide

Japanese tantō dagger by Gassan Sadakazu (1836–1918), featuring a double-edged tip in kogarasu maru zukuri style, made in the early twentieth century. — Tantō by Gassan Sadakazu (1836–1918), made in the early twentieth century. From the collection of Samurai Museum Berlin.

The Anatomy: Parts of the Katana

Japanese terminology for sword parts is precise down to the smallest detail. In his Encyclopedia of Japanese Swords, Markus Sesko has catalogued over 1,000 terms – the language itself is proof of the cultural significance of the blade.

The Body of the Blade

Kissaki (切先) – The Point

The shape of the point reveals the era: a ko-kissaki (small point) is typical of Kamakura swords (1185–1333), an ō-kissaki (large point) of the Nanbokuchō period (1336–1392). The point is set off from the rest of the blade by a slight curve (yokote).

Shinogi (鎬) – The Ridge Line

This raised line runs parallel to the edge and defines the geometry (shinogi-zukuri). It divides the blade into two planes: shinogi-ji (flat side) and ji (main surface). The position of the shinogi determines the balance and cutting power.

Mune (棟) – The Back of the Blade

The back is usually forged in iori-mune form: two flat surfaces that meet at a blunt ridge. This “roof shape” is structurally stable and lighter than a rounded back.

Ha (刃) – The Edge

The edge is not ground evenly, but follows a complex geometry (hira-niku) that tapers towards the point. The edge angle is 15–20 degrees.

Hamon (刃文) – The Hardening Line

The visible boundary between hardened and unhardened steel. The pattern can be straight (suguha), undulating (notare), clove-shaped (chōji) or wild (gunome). The hamon is produced by the crystal structure of the martensite and is not painted or etched. In our sword gallery you can study a particularly characteristic gunome midare hamon on the blade by Hizen Munetsugu – the undulating pattern is a hallmark of the Hizen school.

Nakago (茎) – The Tang

The tang bears the smith’s signature (mei), the date (nengō) and often additional information (kinzōgan: gold inlays). The rust patina (sabi) must never be removed – it is the blade’s certificate of authenticity. Sesko warns: “The patina of the tang is an important criterion for judging the age of a blade. A polished nakago destroys its historical value” (Sesko, Encyclopedia, p. 285).

The file marks (yasurime) on the tang are as individual as a fingerprint: katte-sagari (sloping diagonally), sujikai (straight), kiri (crossing). Re-cutting them is regarded as a sign of forgery.

The Mounting (Koshirae, 拵)

Tsuba (鍔) – The Sword Guard

The hand guard protects the hand and serves as a counterweight. Tsuba are also art objects: inlaid motifs in gold (kinzōgan), silver (ginzōgan) and copper-gold alloy (shakudō) show dragons, cranes and historical scenes.

Tsuka (柄) – The Hilt

The hilt is made of wood, covered with ray skin (samegawa) and wrapped with silk braid or leather strips (tsuka-ito). Two hilt ornaments (menuki) lie beneath the wrapping – originally for fastening, later purely decorative.

Fuchi (縁) and Kashira (頭) – Hilt Fittings

Metal rings at the beginning and end of the hilt. They stabilise the construction and often complement the design of the tsuba.

Saya (鞘) – The Scabbard

The scabbard is made of wood, lacquered (urushi) and often reinforced with metal fittings. A cotton cord (sageo) allows it to be fastened to the belt. In the Edo period samurai often carried two-coloured saya: black for duty, red for ceremonies.

How Is a Katana Forged? The 5 Steps

Making a traditional katana sword takes three to six months. Every step requires decades of experience – one mistake can destroy weeks of work. In our exhibition we explain the process using original tools and intermediate products.

Step 1: Tamahagane – Producing the Steel

The tatara furnace is a clay structure about 1.2 metres high. For three days and nights, workers burn 13 tonnes of charcoal while adding iron sand (satetsu) in layers. The temperature reaches 1,500 degrees Celsius – controlled without modern thermometers, only by observing the colour of the flames.

The result: a 2.5-tonne block of steel (kera), which is broken up with hammers. Only about 1 tonne is usable steel. The smith sorts the pieces by carbon content:

Tamahagane (玉鋼, 1.0–1.5% C): high-carbon steel for the edge
Hagane (鋼, 1.0–1.5% C): hard steel for the edge
Hōchō-tetsu (包丁鉄, 0.5–0.8% C): soft steel for the core

Why not better steel? Stephen Turnbull explains: “Japanese swordsmiths were not working with superior raw materials. They were extracting iron from sand because they had no alternative. The tatara process was a necessity, not a choice” (Turnbull, Katana, p. 24).

Step 2: Oroshi-gane – Folding the Steel

The myth: Folding makes the blade stronger. 10,000 folds produce an indestructible weapon.

The reality: Folding homogenises the steel, but does not make it stronger. Each fold doubles the layers:

4 folds: 16 layers
8 folds: 256 layers
12 folds: 4,096 layers
16 folds: 65,536 layers

Most traditional blades were folded 12 to 15 times. More folds are pointless: from about 20,000 layers onwards the carbon diffuses so evenly that further folding has no effect. The steel just gets thinner.

The process:

The smith heats a block of steel to 1,100 degrees (cherry red).
He breaks it up with a hammer and stacks the pieces on top of each other.
He forges the stacks together (welding by pressure).
He repeats the process.

Why fold at all? Tamahagane from the tatara furnace is heterogeneous – some areas have 0.8% carbon, others 1.5%. Folding distributes the carbon evenly so that the blade does not break at weak points.

The characteristic patterns on the polished blade (hada, 肌) are by-products of folding: masame (straight lines), mokume (wood grain), ayasugi (cedar bark). They prove the smith’s skill, but have no functional significance.

Step 3: Tsukurikomi – The Composite Construction

A blade of pure steel (60 HRC) would be extremely sharp – but brittle. An impact would break it. A blade of soft iron (30 HRC) would be flexible – but too soft to cut. The solution: composite steel.

The smith combines hard and soft material in layers:

Kobuse (甲伏せ) – The Standard Construction

Outside: Hard steel (edge + sides)
Inside: Soft iron core
Result: The edge cuts, the core absorbs shocks

Honsanmai (本三枚) – The Three-Layer Variant

Edge: Hard steel
Sides: Medium-hard steel
Back: Soft iron core
Advantage: The sides reinforce the blade against lateral bending

Shihozume (四方包) – The Four-Layer Luxury Construction

Four different grades of steel, layered like a sandwich
Rare: Only master smiths use this technique, as it is extremely difficult

The smith welds the layers at 1,200 degrees and shapes the blade by hammering. The silhouette (sugata) is refined by grinding: the curvature (sori), the thickness (kasane), the balance (motokasane).

Step 4: Yaki-ire – Differential Hardening

This is the most critical moment. A mistake here destroys the blade irretrievably.

The smith mixes a paste of clay, powdered charcoal and rice-straw ash. He applies it to the blade:

Edge: Thin layer (1–2 mm)
Back: Thick layer (5–7 mm)
Transitions: The smith paints the pattern of the hamon with applications of varying thickness

The blade goes into the furnace. At 800 degrees Celsius (cherry red) the steel absorbs carbon. The colour is the temperature sensor – no modern forge uses pyrometers. Knowledge of the exact colour is the secret of every school.

Then: quenching. The smith plunges the blade into a water bath. The edge cools in seconds and forms martensite – an extremely hard crystal structure. The back cools slowly and forms pearlite – soft, tough crystals.

The result:

Edge: 60–62 HRC (hard, sharp, brittle)
Back: 30–40 HRC (soft, flexible, tough)
Curvature: The edge contracts more strongly than the back – the blade bends

The hamon becomes visible: the boundary between martensite (white, cloudy) and pearlite (dark, smooth). The pattern is not decorative, but the direct result of physics. Markus Sesko emphasises: “The hamon is the visible manifestation of the steel’s crystal structure. It cannot be faked by etching or painting” (Sesko, Encyclopedia, p. 19).

Step 5: Shiage-togi – The Final Polish

The blade has been forged – but it is invisible. The surface is rough, the hamon hidden, the beauty of the steel locked away.

Now the work of the polisher (togishi) begins. This is a profession in its own right with 10 to 15 years of training. In Japan, a master polisher earns more than some smiths.

The process uses 7 to 12 different whetstones (toishi), from coarse to ultra-fine:

Binsui (備水倉) – coarse stone (grit 220): removes hammer marks, shapes the geometry
Kaisei (改正) – medium stone (400): refines the shape
Chu-Nagura (中名倉) – fine stone (800): first polish
Uchigumori (内曇) – mist-fine (2000): the hamon becomes visible
Narutaki (鳴滝) – waterfall stone (5000): gloss polish of the edge
Hazuya (刃艶) – powder stone (8000–10000): final lustre

The last step: nuguigami – a special paper made from rice straw, soaked in uchiko (polishing powder). The polisher dabs the blade until it shines like a mirror.

Polishing takes 40 to 80 hours per blade. One mistake – too much pressure, the wrong angle – destroys weeks of work.

Markus Sesko distinguishes two philosophies:

“It is essential to distinguish between *kaji-togi* (the smith’s rough polish, focusing on geometry) and *shiage-togi* (the professional togishi’s final polish, revealing the aesthetic features).” (Sesko, *Encyclopedia*, p. 185)

Why is polishing so important? Without it, the hamon is invisible. The hada (steel pattern) remains hidden. The blade looks like a dull piece of metal. Polishing is not optional – it is the difference between weapon and work of art.

The Evolution: From Tachi to Katana

The katana did not appear as a finished form. It developed over a thousand years – a slow adaptation to changing warfare, social structures and technological revolutions. The blade that lies in museums today carries the history of Japan in its shape.

Period Designations in Japanese Swordsmithing

Sword experts divide Japanese blades into four main periods – a system that was standardised in the 20th century:

These categories are not rigid boundaries, but fluid transitions. In our sword gallery you can compare examples from all four periods.

Heian Period (794–1185): The Tachi – Sword of the Horsemen

The warrior of the Heian period fought from horseback. His primary tool was the bow (yumi). The sword hung as a backup from the saddle – edge down, suspended from the belt. This weapon was called the tachi (太刀, “long sword”).

The tachi was optimised for mounted archers:

Strong curvature (koshi-zori): the curve lies close to the hilt, ideal for cuts from horseback
Narrow point (ko-kissaki): reduction of weight, focus on cutting rather than thrusting
Long blade (70–90 cm): reach from the saddle

Why curved? The curvature arose as a by-product of differential hardening. But the smiths kept it because it increased cutting power: a curved blade “draws” through the target instead of merely hacking.

The Cambridge History documents: “The tachi was the weapon of the mounted aristocratic warrior (bushi), who dominated warfare until the Mongol invasions forced tactical changes” (Yamamura, Medieval Japan, p. 18).

Kamakura Period (1185–1333): Perfection – the Gokaden

The Kamakura period is regarded as the golden age of Japanese swordsmithing. The military elite (buke) financed smithing schools in five main regions – the gokaden, as they are described in the modern era (五箇伝, “five traditions”).

1. Yamashiro (山城) – Kyoto

Style: Elegant, compact point, tight hamon
Famous smiths: Rai Kunitoshi, Awataguchi Yoshimitsu
Special feature: Courtly aesthetics, often for ceremonies

2. Yamato (大和) – Nara

Style: Plain, military, straight blades
Famous schools: Tegai, Senjūin
Special feature: Forged for temple warriors (sōhei)

3. Bizen (備前) – Okayama

Style: Long, gentle curvature, utsuri (shadow hamon)
Famous school: Osafune
Special feature: Mass production from the Muromachi period onwards, but high quality

4. Sōshū (相州) – Kamakura

Style: Broad blade, wild hamon (rich in nie)
Famous smiths: Masamune, Sadamune
Special feature: Innovation, hybrid styles

5. Mino (美濃) – Seki

Style: Practical, robust, sharp hamon
Famous smiths: Kanemoto
Special feature: Emerged only late (15th c.), then dominated the mass market

The gokaden are not rigid categories. Markus Sesko warns: “Many smiths practiced hybrid styles (e.g., Sōden-Bizen, combining Sōshū and Bizen techniques). The Gokaden system was retrospectively imposed by later scholars” (Sesko, Genealogies, p. 27).

Nanbokuchō Period (1336–1392): The Giants – Ō-dachi

The Mongol invasions of 1274 and 1281 failed because of typhoons (kamikaze, “divine wind”) – but they revealed a weakness: Japan’s mounted tactics failed against infantry formations with long spears.

One reaction: longer swords.

In the Nanbokuchō period, smiths forged blades of absurd length:

90–120 cm: Large tachi for foot soldiers
120–150 cm: Ō-dachi (“great sword”) – almost as long as a man
150+ cm: Ōdachi or nodachi – ceremonial weapons, too large for combat

These swords had broad points (ō-kissaki) and disproportionate length. Markus Sesko documents:

“Enbun-Jōji-sugata (延文・貞治姿) refers to the characteristic, oversized sword shapes of the Nanbokuchō period, which peaked during the Enbun (1356–1361) and Jōji (1362–1368) eras.” (Sesko, *Encyclopedia*, p. 55)

Why so big? Infantry combat against polearms required reach. A sword had to reach spears before its bearer came within thrusting range. The ō-dachi were not elegant duelling weapons, but battlefield tools.

Most of these giants were later “cut down” (ō-suriage) – too long for the peaceful period that followed. This shortening process explains why almost all surviving works by Masamune exist today as katana, although he originally forged tachi: the tangs were cut off and the signature was lost. Today, original Nanbokuchō blades in their full length are extremely rare.

Muromachi Period (1392–1573): The Birth of the Uchigatana

The Muromachi period brought the decisive innovation: the uchigatana (打刀, “striking sword”) – the katana proper.

What changed?

Manner of wearing: No longer suspended (tachi), but thrust through the belt – edge up
Advantage: Drawing and striking in a single movement (nukitsuke)
Tactics: Focused on duels rather than the battlefield

Why the change? Three factors:

Urbanisation: The development of castle towns (jōkamachi) led to narrow alleys and indoor fighting. A suspended sword got caught everywhere.
Sengoku Jidai (1467–1603): The century of wars led to mass battles. Foot soldiers (ashigaru) needed cheaper, shorter weapons that could be drawn quickly.
Firearms: The arrival of the Portuguese tanegashima (muskets) in 1543 made armour heavier and cavalry riskier.

The Cambridge History documents: “The shift from tachi to uchigatana coincided with the decline of mounted warfare and the rise of infantry tactics during the Sengoku period” (Yamamura, Medieval Japan, p. 20).

Edo Period (1603–1868): The Katana as Status Symbol

1600: The Battle of Sekigahara. Tokugawa Ieyasu unites Japan. The Edo period begins – 250 years of peace (Pax Tokugawa).

The katana loses its military function. It becomes a status symbol.

The Daishō System (大小)

From 1638 onwards, only samurai are permitted to wear two swords:

Katana (大, “large”): over 60 cm
Wakizashi (小, “small”): 30–60 cm

This pair visually marks the samurai class. A peasant with two swords risked execution.

1588: Katanagari (刀狩り) – The Sword Hunt

Toyotomi Hideyoshi forbids peasants to own weapons. The sword becomes an exclusive samurai privilege.

Craftsmanship Instead of War Equipment

Tsuba: Inlaid motifs (gold, silver, shakudō)
Saya: Lacquered scabbards with family crests
Menuki: Miniature sculptures (dragons, gods)

Meiji Period (1868–1912): The End – the Haitōrei Edict

1868: The Meiji Restoration.
The emperor takes power. Japan opens up to the West. The samurai class becomes obsolete.

1876: Haitōrei (廃刀令) – The Sword Ban
The government bans the wearing of swords in public. The justification: modernisation, dismantling of feudal privileges. In practice: the disempowerment of the samurai class.

The consequences:

Hundreds of forges close or switch to kitchen knives
The gokaden traditions die out (only individual smiths remain)
Owning a sword becomes stigmatised

1877: The Satsuma Rebellion
The last samurai under Saigō Takamori rebel against the sword ban. They fight with katana against rifles. They lose. The era of the samurai ends in bloodshed.

The rebirth:
Only in 1933, under the military regime, did swordsmithing experience a renaissance. The guntō system (軍刀, military sword) distinguished between shin-guntō (army) and kai-guntō (navy) and financed traditional smiths for officers’ weapons. After 1945 the art was preserved as intangible cultural heritage (UNESCO 2014). Today there are about 200 licensed smiths in Japan.of cultural identity“ (Hall, Early Modern Japan, p. 42).

Tachi vs. Katana: The Most Important Differences

Visual distinction: If the signature on the tang faces upwards when the sword is worn suspended (edge down), it is a tachi. If the signature faces upwards when the sword is worn thrust through the belt (edge up), it is a katana.

Many tachi were later reworked (ō-suriage) and worn as katana – the signature reveals the original form.

Katana at the Samurai Museum Berlin

Our Collection: 48 Katana from Six Centuries

The Samurai Museum Berlin houses one of the most extensive samurai collections in Europe – including 48 authentic katana from the Kamakura period (1185–1333) to the Meiji Restoration (1868–1912). Every blade tells a story: of battles, smiths, families.

Highlights of our collection:

The Gokaden Explained

Here we present the five great smithing traditions of the kotō period using original examples. About 80% of all blades forged before 1530 come from schools of these five traditions. The term gokaden was only systematised in the Meiji period by Hon’ami Kōson (1879–1955) – before that, swords were classified by province of origin.

Blade by Hizen Munetsugu (1606)

A signed shintō blade of the first generation, 74 cm long with 1.5 cm curvature. The characteristic gunome midare hamon (undulating with irregularities) is a hallmark of the Munetsugu style. Both sides of the blade bear Buddhist engravings (horimono): a ritual sword with dragons on the outer side, chopsticks for Shintō altars on the inner side.

Blade by Hizen Tadayoshi with Tameshigiri Inscription

This blade bears a gold inscription (kinzōgan mei) by Yamano Kanjūrō Hisahide (1635–unknown), the government’s official sword tester from 1685. The inscription confirms cutting tests (tameshigiri) on two bodies – an Edo-period certificate of quality.

Nagamaki with Tachibana Crest

A hybrid weapon between sword and naginata, popular with warlords such as Oda Nobunaga (1534–1582). The extended hilt (70–100 cm) allowed powerful swings on horseback and on foot. This black-lacquered nagamaki shows the mon (family crest) of the Tachibana clan.

Interactive learning: Our exhibition explains not only history, but technique. At interactive stations, visitors can recognise the differences between gokaden schools, understand the function of the hamon and follow the evolution of sword shapes.

Frequently Asked Questions (FAQ)

How much does a real katana cost?

An authentic historical katana from the Edo period (1603–1868) costs between €5,000 and €50,000, depending on the smith, state of preservation and provenance. Swords by famous smiths (Masamune, Muramasa, Gassan Sadakazu) can cost millions – a Masamune was auctioned for 1.2 million dollars in 2019.

Modern hand-forged katana (gendaitō) by licensed smiths start at €3,000 and can cost up to €30,000, depending on the smith and quality.

Modern relevance:
Today the katana is UNESCO intangible cultural heritage (2014). The traditional art of swordsmithing is preserved by about 200 licensed smiths in Japan. Each blade requires three to six months of handwork – the technique has hardly changed since the Middle Ages.

In museums such as ours you can experience this history at first hand: 48 historical katana from six centuries, documented by international experts, explained with scientific precision.

Visit us at the Samurai Museum Berlin. Stand before a 700-year-old blade from the Kamakura period. See the hamon shimmer – the visible proof of a technique that survived the Middle Ages. Recognise the differences between the five gokaden schools. Understand why Japanese smiths possessed no superiority, but proved their mastery.

Visit us at the Samurai Museum Berlin

and see 48 historical katana from 6 centuries.

→ Tickets & Opening Hours

→ All Exhibitions at a Glance

Bibliography

Primary Sources

Samurai Museum Berlin (2025). SMB Catalogue 2025 ONLINE. Berlin: Samurai Museum Berlin GmbH.
→ Bottomley, Ian: “History of Japanese Arms and Armour”, pp. 14–43.
→ Catalogue: swords category, pp. 108–121.
Sakakibara Kōzan (1800/1962). The Manufacture of Armour and Helmets in Sixteenth Century Japan. Transl. H. Russell Robinson. The Holland Press.
→ Parallels in forging technique for sword production.

Academic Secondary Literature

Friday, Karl F. & Seki, Fumiko (1997). Legacies of the Sword: The Kashima-Shinryū and Samurai Martial Culture. Honolulu: University of Hawaii Press.
→ Combat tactics (pp. 45–67), the sword as backup weapon (p. 67).
Hall, John Whitney (ed.) (1991). The Cambridge History of Japan, Volume 4: Early Modern Japan. Cambridge University Press.
→ Katanagari (p. 93), Haitōrei (p. 42), Edo-period transformation (pp. 32–40).
Yamamura, Kōzō (ed.) (1990). The Cambridge History of Japan, Volume 3: Medieval Japan. Cambridge University Press.
→ Tachi → katana transition (p. 20), Mongol invasions.
Ogawa, Morihiro (ed.) (2009). Art of the Samurai: Japanese Arms and Armor, 1156–1868. New York: The Metropolitan Museum of Art.
→ Arsenal statistics (p. 88), hierarchy of weapons.

Specialist Databases

Sesko, Markus (2014). Encyclopedia of Japanese Swords. Lulu Enterprises.
→ Terminology (pp. 5–8), tamahagane (p. 81), hamon (p. 19), nakago (p. 285), yasurime (p. 520), Enbun-Jōji-sugata (p. 55), polishing (p. 185), sori (p. 351).
Sesko, Markus (2010). Genealogies and Schools of Japanese Swordsmiths. Books on Demand.
→ Gokaden (pp. 27–61), Osafune mass production (p. 42).

Expert Literature

Turnbull, Stephen (2010). Katana: The Samurai Sword. Osprey Publishing.
→ Definition (p. 16), tatara furnace (p. 24), yaki-ire (p. 36).