Tsukushi Nobukuni(筑紫信国) – Authentic Katana(1333–1573) – Dragon Carving on Blade
JPY ¥ 2,330,000
Description
From the Katana Enthusiast
An exceptionally rare Katana—seldom seen even in top-tier domestic auctions—combining scarcity with remarkable quality in both Hamon and Jigane.
Forged by Tsukushi Nobukuni, a distinguished group of swordsmiths who blended the refined elegance of the Kyoto Nobukuni school with the robust strength of Kyushu craftsmanship.
Very few of their works survive today, making any existing piece highly valuable—and this one is made even more extraordinary by the dragon carving engraved on the blade, an almost unheard-of feature in Nobukuni swords.
Katana Certificate of Authenticity and Registration
Based on a comprehensive evaluation of every detail and element of craftsmanship, we can confidently state that this Katana is not only a “Real Katana,” but also an “Authentic Katana” of exceptional historical value. For the definition of an Authentic Katana, please refer to this page.（→ What Makes A Katana Real）
This Katana has been certified as a Tokubetsu Hozon Token (特別保存刀剣) by the NBTHK (Nihon Bijutsu Token Hozon Kyokai), a prominent organization in Japan dedicated to the preservation of Japanese swords. This title is awarded to swords that are considered to be of high craftsmanship and in good preservation condition. It ranks above the regular Hozon Token(保存刀剣) certification, indicating a higher level of appraisal. (The official certificate paper is included in the set.)
While NBTHK certification is a respected standard and provides a helpful indication of quality and authenticity, it should not be viewed as a definitive measure of a sword’s true value. In reality, many swords are able to obtain certification if they meet certain criteria, meaning not all certified swords are particularly rare or exceptional. Conversely, some outstanding swords remain uncertified simply because their owners have not submitted them for evaluation.
That said, being recognized by Japan’s most established sword appraisal organization does provide a useful baseline, and can serve as a reassuring point of reference when considering a sword.
All Real Katanas are officially registered with the Board of Education of the prefecture in which they are located, and each comes with a registration certificate. This Katana also comes with its registration certificate, as shown in the attached image.
The original certificate must be returned to the Board of Education prior to export, but we will provide a copy of the certificate along with your purchase.
Each part of the Katana
1. Toshin(刀身)
The Toshin refers to the entire blade of the Katana.
When evaluating a Katana, the blade’s length—and particularly its sori (curvature)—is a key point of appreciation.
The sori is what enables the Japanese sword to remain unbreakable and unbendable, while also allowing it to cut through objects with remarkable efficiency and minimal force.
If you’re interested in the scientific background of this, we explain the theory in detail in the following article:
Curved for a Reason: The Hidden Function of Authentic Katana’s Shape
【Toshin of This Katana】
Koshirae Full Length: 98.5cm
Overall Length : 89.5cm
Blade Length (Nagasa): 68.3cm
Width at Base (Motohaba) : 2.5cm
Thickness at Base (Motokasane) : 0.6cm
Weight : 0.6kg
Curvature (Sori): 1.6cm
2. Hamon(刃文)
The Hamon is a white, wave-like pattern that appears along the edge of an authentic Katana blade.
There are two primary types of Hamon: the straight-line Suguha, and the more irregular, wavy Midareba.
While these can be further classified into many subtypes, the Hamon is a key element in sword appraisal, as it reflects the unique characteristics and techniques of the swordsmith.
It’s also one of the most visually enjoyable features of a Katana, making it fun to choose a blade based on the Hamon that resonates with you.
【Hamon of This katana】
3. Jigane(地鉄)
Jigane refers to the intricate surface patterns that appear on the blade of a Katana.
These patterns are created when tamahagane—steel made from iron sand, the raw material—is repeatedly folded and forged.
Each Katana reveals a unique Jigane pattern, offering a window into the artistry and technique of its maker.
【Jigane of This Katana】
4. Nakago(茎)
The Nakago is the tang of the Katana—the part of the blade that extends into the handle.
It often bears a mei (銘), or signature, which may include the name of the swordsmith and the date of its creation.
【Nakago of This Katana】
5. Tsuba (鍔)
The Tsuba is a metal guard positioned between the Toshin (blade) and the handle. Its primary function is to protect the wielder’s hand from an opponent’s blade during combat.
Conversely, it also prevents the hand from slipping forward onto the blade during a strike.
In addition, the Tsuba helps to balance the Katana by adjusting its center of gravity.
There are many different styles of Tsuba, ranging from purely functional to highly decorative.
Some are so exquisitely crafted that they are recognized as valuable works of art—with certain Tsuba designated as Important Cultural Properties by the Japanese government.
【Tsuba of This Katana】
6. Koshirae(拵え)
Koshirae refers to the complete exterior mountings of a Katana, including the handle (tsuka), guard (tsuba), and scabbard (saya).
There are two main styles of Koshirae: Uchigatana Koshirae (打刀拵) and Tachi Koshirae (太刀拵). Because each Katana differs in length, curvature, and proportions, a unique Koshirae is custom-made to perfectly match each blade.
The Koshirae itself is considered an important work of art.
We hope you’ll enjoy appreciating it as a complete expression of the Katana’s beauty and balance.
【Koshirae of This Katana】
About Nobukuni(Tsukushi)
1. Overview
Tsukushi Nobukuni refers to a lineage of swordsmiths who were active in Kyushu from the Nanbokucho period (beginning in 1336) through the end of the Muromachi period (1573).
The Nobukuni school originally began in 1356 and remained active in Kyoto until the Ōei era. From the Eikyō era (circa 1440), the lineage expanded to Buzen, and later, during the Keichō era, to various regions of Kyushu including Chikuzen, Chikugo, Bungo, and Higo.
To distinguish them from their origins in Yamashiro (Kyoto), these smiths are commonly referred to as Tsukushi Nobukuni.
Their work represents a prestigious chapter in the history of Japanese sword-making, blending the refined elegance of Kyoto with the robust spirit of Kyushu craftsmanship.
2. Genealogy of Nobukuni(Tsukushi)
The first generation of Tsukushi Nobukuni is believed to have been either a disciple or a descendant of Kyoto Nobukuni.
Swords made by Tsukushi Nobukuni are a rare fusion of the refined elegance of Kyoto craftsmanship and the rugged strength of Kyushu tradition.
Due to their limited number, these swords are considered highly rare and valuable. Some have even been certified by the NBTHK (The Society for the Preservation of Japanese Art Swords) as Tokubetsu Hozon or Juyo Token.
Pieces with carvings—especially dragons or Buddhist motifs—are particularly prized for both their artistic and historical significance.
3. Characteristics of This Katana
The blade of this Katana features an exceptionally beautiful and elaborate carving known as “Kurikara.”
Kurikara is a manifestation of Fudō Myōō, the Buddhist guardian deity, in the form of a dragon coiled around a sword. This motif is also known as Kenmakiryū (剣巻龍), or “Sword-Wrapped Dragon,” symbolizing the triumph of Buddhism over heretical or non-Buddhist beliefs (外道, Gedo).
Sword blades with such intricate carvings are extremely rare and are especially prized by collectors who appreciate swords not only as weapons, but also as profound works of art.
From the Gokaden Lineage: Yamashiro-den Roots
Many Japanese swords trace their roots back to one or more of the five major traditional schools of swordsmithing, known as the Gokaden(五箇伝).
These five traditions—Yamato, Yamashiro, Bizen, Soshu, and Mino—each developed in different historical provinces and are known for their distinct styles and characteristics.
This sword is rooted in the Yamashiro-den(山城伝) tradition.
Yamashiro-den originated in Yamashiro Province (present-day Kyoto Prefecture) during the mid-Heian period. As Kyoto was the imperial capital and cultural heart of Japan, swords from this tradition reflect a sense of elegance, refinement, and classical aesthetics.
Yamashiro-den produced some of the earliest and most revered swordsmiths in Japanese history, such as Sanjo Munechika(三条宗近), who helped establish the foundation of Japanese sword artistry. Many of the early Yamashiro blades were crafted for ceremonial use or for members of the aristocracy, leading to a style that prioritized subtle beauty over brute force.
As a result, swords rooted in the Yamashiro-den tradition are highly valued by collectors for their graceful appearance, historical importance, and timeless charm.
Buyer’s Guife
Authentic Katanas are limited in number, and we hope each one finds its way to a collector who truly appreciates its value.
Before making a purchase, please take a moment to review our [Buyer’s Guide] for important information.
Shipping Information
1.Time Required for Delivery
This is a truly domestic Japanese sword that has never left Japan.
In order to export it overseas, we must obtain an official export permit from the Agency for Cultural Affairs of Japan.
It typically takes around 25 business days from the time of payment until the export process begins.
After shipment, delivery usually takes 7 to 20 days, depending on the destination country.
2.Shipping Charges
Shipping is free of charge.
We offer international shipping to most countries, with the exception of China and Russia.
3.Regarding Imports
Please check with your local customs office regarding regulations on importing Japanese swords.
We are not responsible for delays, rejections, or seizures by customs in the destination country.
For more details, please refer to our dedicated [Shipping Information] page.
Payment
To ensure a secure and respectful purchasing process, we currently accept bank transfers only.
As each katana is a legally registered cultural asset—not a weapon—we prioritize direct communication with buyers. This allows us to confirm intent, provide details, and build trust before completing any transaction.
Our approach reflects our deep respect for the historical and artistic value of Japanese swords and our commitment to responsible international sales.
For more details, please refer to our dedicated [Payment] page.
Frequently Asked Questions (FAQ)
If you have further questions, feel free to contact us directly.
Do you ship internationally?
Yes, we ship authentic Japanese swords worldwide. Even if we do not have a delivery record to your country, we will do our best to arrange secure delivery.
Currently we do not ship to China or Russia.
Is shipping really free?
Yes. All listed prices include complimentary international shipping. No additional delivery fees will be charged.
How long will it take to receive my sword?
Because we must obtain export approval from Japan’s Agency for Cultural Affairs, it takes about 25 business days to begin shipping. Including transit time, please allow 1–2 months for delivery.
For more details, please refer to our Shipping Information.
Are the swords already exported items?
No. Every sword we offer has remained in Japan since its creation and is being exported for the first time.
Are the swords legally exported?
Absolutely. We follow all Japanese regulations and obtain official export permits before shipment.
For more details, please refer to our Legal Status of Japanese Swords.
Do I have to pay customs duties or taxes?
Import duties or taxes may be levied by your country’s customs authority. Buyers are responsible for any such charges. For example, in France, approximately 20% import tax may apply. We recommend checking with your local customs office in advance.
Can I return a sword after purchase?
Returns and exchanges will not be accepted unless agreed upon between the Company and the User.
How do you select the swords you sell?
Our team consists of Katana enthusiasts with backgrounds in metallurgy and history.
We participate multiple times each month in exclusive local auctions in Japan, open only to certified Katana professionals. From these auctions, we carefully select and acquire truly valuable Katanas. Our collection features authentic pieces that are rarely found in ordinary shops.
How can I trust that the sword is real?
We conduct thorough, detailed analyses of every aspect of each Katana. While registration papers and certificates issued by various institutions can serve as one reference point, they do not necessarily guarantee authenticity.
Our stance on what we consider to be “Real” is explained in the article below — we invite you to take a look.
Are these swords actually sharp and functional?
Yes. Our swords are authentic Japanese katana forged by traditional methods and possess a level of sharpness that has been revered for centuries. They are not decorative replicas—they are real blades capable of cutting. Please handle with the utmost care to avoid injury or damage.
I’m looking for something specific. Can I request it?
Certainly. Please contact us with your requirements—design, smith, school, era, condition—and we will be happy to assist.
