Katana Inscriptions: What the Writing on Japanese Swords Can Tell Us

Katana inscriptions are characters chiseled into a Japanese sword, most often on the tang hidden under the handle. Called mei, they usually name the swordsmith. Many also record the province he worked in, an honorary title, the forging date, the owner, or the result of a cutting test.

Reading them takes patience. The characters are kanji, cut by hand with a chisel and hammer, and they often look more like rushed handwriting than print.

You don't need to read Japanese to get real value from a tang, though. Once you know where to look, the order the characters follow, and which few kanji repeat, a signature starts to read like a short biography of the blade.

This guide covers how a signature is built, the main types of Japanese sword inscriptions, how dates are written, and what no inscription can prove.

Key takeaways

• Most katana inscriptions sit on the tang (nakago), covered by the handle.

• A short mei is often just the smith's name; longer ones add province, title, clan, and saku ("made this").

• The back of the tang usually carries a date or the name of the person the sword was made for.

• Forged signatures are common, so a mei alone never proves a blade is genuine.

• Never clean or polish the tang of an old sword. Its rust helps date it.

What Are Katana Inscriptions?

Katana inscriptions are any writing a smith, owner, or appraiser added to a Japanese sword. The main one is the mei, the maker's signature. Others record dates, owners, cutting tests, or an expert's attribution, and together they're the closest thing an old sword has to paperwork.

The word mei (銘) simply means signature or inscription. A blade with no signature is called mumei. A blade with a false signature is called gimei, and you'll hear that word a lot once you start looking at antiques.

Not every sword was signed. Very early blades rarely carry a mei, and some smiths only signed their best work. A blade could also lose its signature when the tang was cut down to shorten the sword.

Modern katana are a different story. Buyers expect a signature, so most new blades carry tang markings of some kind. On production swords, those marks usually follow tradition rather than identify one master smith. Keep that in mind before you read too much into them.

Where Japanese Sword Inscriptions Appear

Almost every inscription lives on the tang, and which face it sits on matters as much as what it says.

The Tang (Nakago): Front and Back

The tang, or nakago, is the unpolished steel that runs into the handle, and it holds nearly every inscription you'll find. The front face carries the smith's signature, called the omote-mei. The back face carries the ura-mei, which usually records the date of manufacture or the sword's owner's name.

Which face counts as the front depends on how the sword was worn. A katana went through the belt edge up, so its signature faces out in that position. That's katana-mei, and most swords made after the Muromachi period follow it.

A tachi hung from the belt with the edge facing down. Its signature, the tachi-mei, sits on the opposite face. That flip is a quick, useful clue about how a blade was meant to be carried.

There are exceptions. Some smiths, such as Yamashiro no Kami Kunikiyo, signed nearly everything tachi-style, including short swords. Very high-ranking patrons sometimes ordered blades signed tachi-style, as a mark of respect. So treat signature placement as a clue, not a verdict.

Signatures Saved From Shortened Tangs

When a long sword was cut down, its signature didn't always disappear. Swordsmiths and polishers had three ways to preserve it: folding the signed section over (orikaeshi-mei), setting it into the new tang as a framed panel (gaku-mei), or fixing it on as a riveted patch (hari-mei).

An orikaeshi-mei is easy to spot once you know it. The signed metal is thinned and folded back onto the other face, so the characters read upside down. A gaku-mei, also called tanzaku-mei after the narrow vertical cards used for poems, looks like a small rectangle inlaid into the tang.

The hari-mei is the most obvious of the three. The panel holding the original signature is cut from the discarded section and attached to the new end of the tang with small rivets.

Here's the catch. Forgers have used the same methods to move a genuine signature onto an inferior blade. Any transplanted mei deserves a hard look at the surrounding steel, file marks, and rust before you believe it.

How to Read Kanji on a Katana Tang

Reading kanji on a katana gets much easier once you know the characters that repeat and the order they follow.

Common Kanji You'll See on Katana Inscriptions

A small set of kanji does most of the work on a sword tang. Learn the characters for "made," "year," "month," the common titles, and a few clan names, and you can often split a signature into its parts before you know a single smith's name.

One caution. Smiths carved in both blocky and cursive styles, so the character on your tang may look nothing like the tidy chart version. Compare overall shape, not exact strokes.

Reading a Mei Step by Step

Read a mei from the top of the tang down, starting nearest the blade. Find the last character first and check whether it's saku. Then work backward through the given name, clan name, title, and province. Finally, flip the sword over and look for a date.

1. Photograph the tang under low, angled light so shallow chisel strokes cast shadows. Never scrub the tang to see more clearly.

2. Count the characters. Two usually means the smith's name alone, and a third is often saku.

3. Look for 作 at the bottom. It tells you the characters above it name the maker.

4. Check the top two characters for a province, often followed by ju, meaning "resident of."

5. Scan for a title such as kami or daijō, then a clan name like Fujiwara, Minamoto, Taira, or Tachibana.

6. Turn the sword over. If the back is inscribed, it's usually a date.

A classic reference example is "Soshu ju Masahiro saku." It reads as "made by Masahiro, resident of Soshu." Most long signatures follow the same pattern, just with more pieces added.

Types of Mei and What Each One Tells You

Collectors sort Japanese sword inscriptions by length, by position, and by who added them. A short niji-mei gives only the smith's name. A long naga-mei can run to six characters or more, and later inscriptions by owners or appraisers each have their own names.

One oddity: a damei is a signature cut by a son or student with the master's permission, and it counts as genuine.

Reading Date Inscriptions on Japanese Swords

Date inscriptions usually sit on the back of the tang. They start with an era name, then the year within that era, then the character 年 (nen) for year, then the month. Some use the zodiac year alongside the era name, or in place of it.

Three dating systems show up on swords. Nengo are era names. Eto is the sixty-year zodiac cycle. Koki counts years from the legendary founding of Japan by Emperor Jimmu in 660 BCE; it appears often on World War II era blades and was dropped after the war.

Two traps catch beginners. Era names changed often before 1868, when Japan moved to one era per emperor, so you'll need a reference list to pin down the first two characters.

The second trap is the calendar. Japan adopted the Gregorian calendar on January 1, 1873, so an older sword's "eighth month" isn't August. Record it as the eighth month.

A real example: one uchigatana's back reads 大永三年八月日, "Daiei 3rd year, 8th month." The final 日 has no number, so it gives no exact day. That's normal.

Other Inscriptions: Owners, Test Cuts, and Appraisers

Beyond the maker and the date, a tang can record who ordered the sword, who owned it later, how it performed in a cutting test, and who appraised it. These extra lines often hold more history than the signature itself. Some are cut into the steel, while others are added in red lacquer or gold.

• Tame-mei or chumon-mei names the original customer. A shoji-mei is different, since it can name any later owner.

• Tameshi-mei records a cutting test, usually on the face opposite the smith's signature. Recording test results on the tang became standard practice in the mid-1600s.

• Kinmei or taimei means someone of very high rank, up to the shogun or the emperor, ordered the blade.

• Appraisers added Shu-mei and kinzogan-mei as attributions in red lacquer or inlaid gold.

One well-known wakizashi by Kunikiyo shows how much fits on a few inches of steel. Its tang carries a date from 1666, the name of the tester Yamano Kaemon, and a note that the blade cut through two torsos in one stroke.

Can a Katana Inscription Prove a Sword Is Genuine?

No. A signature alone never proves a Japanese sword is authentic. Forged signatures are common, and someone can cut a mei years after the blade was made to raise its value. Experts first judge the steel, shape, and tang, then check whether the signature matches what they see.

That process is called kantei. In Japan, organizations such as the NBTHK and NTHK hold formal reviews called shinsa and may issue papers recording the judges' opinions. A blade can fail shinsa for a false signature, for poor condition, or for a bad polish.

Even a real signature has limits. On World War II era swords, a mei doesn't guarantee hand forging, because many were machine-made or only partly forged and still signed.

For a modern sword, documentation does what a mei used to. Musashi Swords offers replacement Certificate of Authenticity services for its own katanas, so owners have a paper record that doesn't depend on reading the tang. When you buy any new sword, ask what documentation comes with it.

What Kanji on a Modern Katana Usually Means

On a modern katana, kanji usually name a theme or a model rather than sign a maker's work. Product names, collection marks, and characters worked into the design tell you what the sword is meant to represent. They don't place it in a historical lineage, and they aren't trying to.

Take the Hiryū katana. Its name is written 飛龍, "flying dragon," and the theme carries through to the tsuba, which shows a dragon in the clouds around the blade. Read the kanji, and you know what the design is built around.

At Musashi Swords, our California team designs our katanas, and experienced craftspeople produce them under our quality-control standards. We choose the names for meaning, so the kanji and the design tell the same story.

If you're buying a sword for its name, look up the kanji yourself. One different character can change the meaning entirely, and any good seller should be glad to explain what's written.

How to Care for an Inscribed Tang

Leave the tang alone. On an antique, the rust is part of the record. Its color, the clarity of the signature, and the file marks (yasurime) help date the blade and confirm it's genuine, and cleaning or polishing an old tang can wipe out much of its value.

That goes against instinct. New owners want everything bright, so they reach for polish, and the damage can't be undone.

Wipe and oil the blade, not the nakago. Handle the tang with clean, dry hands, and only take the handle off when you need to, since every removal risks scratching an inscription. A sword maintenance kit makes routine blade care easier.

Modern swords are more forgiving. If you own a katana from our California design team and aren't sure about disassembling the handle, our support team can help with maintenance.

Katana Inscriptions FAQ

What is the signature on a katana called?

The signature on a katana is called the mei. It's chiseled into the tang, the part of the blade hidden inside the handle, and usually names the swordsmith. A blade with no signature is called mumei, and one carrying a false signature is called gimei. Collectors check all three terms when describing a sword.

Do all real Japanese swords have inscriptions?

No. Many genuine Japanese swords are unsigned. Very early blades were rarely signed, some smiths signed only their best work, and many signatures were lost when people cut down tangs to shorten the sword. An unsigned blade can still be authentic and valuable, so judge it on the steel and the tang, not the missing name.

What does saku mean on a Japanese sword?

Saku (作) means "made" or "made this." It usually appears as the last character of the maker's signature, right after the smith's given name. When you see it at the bottom of a tang, the characters above it name the person who forged the blade, sometimes with a province and title first.

How do I translate the kanji on my katana?

Start with clear photos of both sides of the tang under angled light. Count the characters, look for saku at the bottom, and check the top for a province name. Swordsmith kanji charts help with matching, but worn or cursive characters are hard to read, so an experienced translator or appraiser is worth asking about valuable pieces.

Can I date a sword from its inscription?

Often, yes. Date inscriptions usually sit on the back of the tang and start with an era name, then a year number, then the character for year. Remember that months on swords made before 1873 follow the old lunar calendar, so read them as numbered months rather than converting them to Gregorian dates.

Find a Katana Whose Kanji Means Something to You

Every inscription, old or new, tells you something about a sword. On an antique, it's the smith, the date, and sometimes a test cut. On a modern piece, it's the theme the designer wanted you to feel every time you draw it.

If you want a katana where the name and the design actually line up, Musashi Swords is a good place to start. Our California team designs our katanas, and we choose each name for what it means. Look closely at the kanji, read the product notes, and pick the story that fits you.

Have questions about what the characters on a sword mean, or how to care for one you already own? Email our team at support@musashiswords.com, and we'll help you sort it out. When you're ready, browse our katana collection.