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Updated: 20 Jul 2024

Antique Japanese Sword Katana Signed by Onizuka Yoshikuni
NBTHK Tokubetsu Hozon Certificate


DELIVERY TIME : Approx. 1-1.5 months
*We ship from Tokyo, Japan. There might be delay in shipment depending on countries.

USA, Canada, Mexico, Germany , Belgium, France, Finland, Hong Kong, Australia
*Please contact us prior to purchase if your country isn’t listed.

INCLUDED : NBTHK Tokubetsu Hozon Certificate, Shirasaya Case, Koshirae Mounting, Traditional Sword Carrying Case, Sword Maintenance Kit, Full Exportation Support

Category Katana ( SHINTO)
Age Early Edo Period (Early-Mid 17th century)
Swordsmith Onizuka Yoshikuni (鬼塚吉国)
Certificate NBTHK Tokubetsu Hozon Certificate
Location Chikugo province (Today’s Fukuoka prefecture)
Blade Size Cutting Edge Length: 68.4 cm (26.9 inches)
Curvature: 2.2 cm (0.86 inches)

More photos& videos available on request. Please feel free to contact us. 

In stock

Antique Japanese Sword Katana Signed by Onizuka Yoshikuni with Tokubetsu Hozon Certificate 


 This blade was signed by Onizuka Yoshikuni (鬼塚吉国), who was especially active during the early Edo period (1615-1624) in Chikugo province (Today’s Fukuoka prefecture). He was one of the most highly regarded swordsmiths in this area during this period.

 Yoshikuni was born in the second year of the Tensho era (1574) in Iwayo village in Oshu province (Today’s Fukushima prefecture). Some of his works have an engraving of the years the blades were made. This kind of work started from the 17th year of the Kan-Ei era (1640)to the third year of the Keian era (1650). There was a record of him forging a blade when he was 77 years old (1650). It is believed that during 1640-1650, his son, the second-gen Yoshikuni, often did a Daisaku for him. Daisaku is a regular act where an apprentice or a child of the swordsmith signs his master’s name with his master’s permission or forges a blade on behalf of the master. That means that Yoshikuni highly acknowledged his son’s craftsmanship. 

 Yoshikuni resided in Iwayo village in Oshu province (Today’s Fukushima prefecture) in his early career but was relocated to Yanagawa domain in Chikugo province (Today’s Fukuoka prefecture) by being summoned by Tachibana Muneshige (立花宗茂), who was the head of the domain. Tachibana Muneshige was an influential figure in this domain and one of the most famous warlords during the warring state period (Sengoku Jidai). Tachibana Muneshige used to rule the area where Yoshikuni lived, and we presume this is where Muneshige knew Yoshikuni’s reputation. 

 Yoshikuni is also known for forging very sharp swords, which made him and his work classified as Wazamono Toko( 業物刀工). Wazamono is a classification of Japanese swords and swordsmiths used in Japan to identify historic blades of exceptional quality in the book written by Kaiho Kenjaku ( 懐宝剣尺 ) in 1797. 

 Fujishiro Yoshio wrote a book called Token Jiten (Japanese Sword Dictionary). He is one of the most reputable Japanese sword experts in modern times. He categorized swordsmiths into five categories (Saijyo Saku, Jyojyo Saku Jyo Saku, Chu Jyo Saku, Chu Saku) regarding the reputation and skill of swordsmiths during the Shinto era (Early-Mid Edo period). Saijyo Saku is in the highest position. This chart often reflects how prominent a Japanese swordsmith is. Yoshikuni is categorized as a Jo Saku swordsmith.


  It is appraised as a Tokubetsu Hozon Token(特別保存刀剣) issued by NBTHK(Nihon Bijutsu Touken Hozon Kyokai:日本美術刀剣保存協会). This authentication paper was only given to authentic Japanese swords, especially well preserved and high quality with artistic value.


*Please keep in mind that there are a couple of minor Kitae Kizu on this blade. Also, there is relatively long noticeable Kitae Kizu on the Shinogiji. If you like to know the detailed condition, please feel free to contact us.


【 Blade】
Cutting Edge Length(Nagasa) 68.4 cm (26.9 inches)
Curvature(Sori) 2.2 cm (0.86 inches)


The crystalline structure which forms along the cutting edge of a blade as a result of the hardening process
visible steel surface pattern created by folding and hammering during forging process

Kissaki: Kissaki is the tip of the Japanese sword.


NakagoNakago is the tang of the Japanese sword.

 Japanese swordsmiths left the black rust on the tang because it prevents red rust while the tang is in its handle. And the discoloration of the tang was created over time, and it is a great indicator for a Japanese sword specialist to estimate when the sword was forged.


Koshirae: Koshirae is the mounting of the Japanese sword. There are several parts that consist of Koshirae such as Saya(Scabbard), Tsuka(Handle), Tsuba(Handguard).


Fuchi-KashiraA pair of matching sword fittings that cover the upper and bottom parts of its sword hilt.

 On this Fuchi Kashira, you would find the Bonjis (梵字, Sanscrit letter). In the case of sword carvings, we often find Fudo Myo-O (不動明王, acalanātha) or his incarnations, and there are also Sanskrit characters that represent this god. Such a trend might have inspired this Fuchi Kashira’s design. Among the various Buddhist Buddhas, Fudo Myo-O was deeply worshiped by Samurai warriors. According to a theory, this god is the incarnation of Dainichi Nyorai (大日如来, Mahāvairocana, the principal image of esoteric Buddhism). Perhaps the most common type of Sanskrit character carved on the blades is the character “Kahn (カーン)”, which means Fudo Myo-O. There is also a Sanskrit character called “Kanmarn (カンマーン),” which is combined with the word “Man.” There was once a trend for Samurai warriors to incorporate motifs with religious meaning into their battle costumes, such as armor and helmets, and it was also a way to express their religious beliefs.

Tsuka and MenukiTsuka is the handle of the Japanese sword and Menuki is its decoration.

 You would see the figures of animals through the gaps of the Tsukamaki thread. We believe this Menuki is a combination of a Ryu (龍, dragon) and a Tora (虎, tiger). Both animals’ designs were favored among Samurai warriors. In particular, Byoubu (屏風, folding screen paintings) with this theme are thought to have been used as tools to show off power in Samurai society.

 Initially, dragons were imaginary creatures found in ancient foreign traditions and myths. Furthermore, it is regarded as a symbol of auspicious signs. Its body is likened to nine animals: antlers are deer, the head is a camel, eyes are demons, the neck is a snake, the belly is the Mizuchi (蛟, a mythical animal in Japan that looks like a snake and has a horn and four legs), scales are fish, claws are falcons, palms are tigers, and ears are cows. It was thought that dragons would reign at the top of all animals because of their odd-looking appearance.

 A tiger is a brave animal. A theory says that some believed tiger patterns would protect people from evil spirits. Therefore, this animal pattern has been treated as a talisman. The combination of these beasts is called the Ryu Ko Zu (龍虎図), a design that expresses the fighting spirit of those with the same power fighting fiercely. This idea might have inspired this Menuki’s design.


Tsuba and HabakiTsuba is the handguard for the Japanese Sword and Habaki is the equipment to make the blade not touch its scabbard inside. It prevents the blade from getting rusty and chipped. 

Saya Saya is the scabbard for the Japanese sword.  

Authentication PaperNBTHK TOKUBETSU Hozon Certificate for the blade (No. 1017514)

  NBTHK, also known as Nihon Bijutsu Touken Hozon Kyokai (the Society for the Preservation of the Japan Art Sword), is one of the oldest Japanese sword appraising organizations in modern-day Japan. They authenticated the blade on March 2rd in the 4th year of Reiwa (2022). They appraised it as Tokubetsu Hozon Touken, the blade especially worth preserving for Japanese society. The purchaser will receive this original certificate as well. We can also translate what is written into English and make a PDF file for your record if you request.

Registration Number : Osaka 56801

 The Board of Education in Osaka prefecture issued a registration paper for this sword . It is called Jyu Token Rui Torokusho(銃刀剣類登録証). Bunkacho(The Agency for Cultural Affairs) acknowledges a Japanese sword with this paper as a work of art.
The sword needs to be traditionally hand-forged and made of Tamahagane carbon steel to be registered in the system. With this paper, its owner in Japan can legally own an authentic Japanese sword. Based on this registration number, we will apply for its export permit.
This paper will need to be returned to the board of education when the sword is being shipped abroad, but you can receive a copy of it. An English translation of this registration paper is available on request.



【About us】
 Samurai Museum is located in Tokyo, Japan, exhibiting antique artifacts related to the Samurai history. Samurai Museum Shop is the place for those who are interested in Japanese culture and craftsmanship. We deal with antique Samurai swords/armor, traditional crafts made in Japan and so on.

Japanese Sword& Export Process
 The Japanese swords we deal with are hand-forged edged swords made in Japan. It was made from the traditional carbon steel called TAMAHAGANE(玉鋼). Samurai Museum is familiar with the proper legal procedure for an antique/ authentic Japanese sword to be exported from Japan. We have sent more than 700 Japanese swords for the past few years (~2024) to amazing owners who appreciate its historical value.

 Each Japanese sword is registered under the Agency for Cultural Affairs and the Board of Education in Japan. They issue a registration paper for each Japanese sword for its owner in Japan to legally possess it. The Japanese sword with its registration paper means it was traditionally hand-forged in Japan.

 To legally export the sword from Japan to other countries, we will have to apply for its permit to the Agency for Cultural Affairs(Bunkacho) and return the original registration paper to the Board of Education. It normally takes around 2-4 weeks to receive this permit after submitting required documents. And we would like you to expect at least 1-1.5 months for your order to arrive at your given address after you ordered. For more detailed info, please click here.

 It is allowed for residents in Japan to own authentic Japanese swords without a special license as long as they come with registration papers. Please feel free to contact us if you are a resident of Japan, whether temporarily or permanently. We will also assist you when you leave Japan and need to obtain the export permit.

【Payment Method】
We accept payment through Stripe (Credit card), PayPal, Apple Pay or ChromePay, all of which are secure payment methods. Also, you don’t need to make an account on Stripe for the checkout. If you prefer other payment method, please contact us. After confirming your payment, we will apply for an export permit. You may either pay in JPY, USD, AUD, CAD,EUR CHF or GBP. The price is set in Japanese Yen. Prices in other currencies are automatically calculated based on the latest exchange rate. 

* If the amount is above 1 million JPY, Stripe or wire transfer will be the only options for payment.

 We have shipped authentic Japanese swords to the USA, Canada, Mexico, Germany , Belgium, France, Finland, Hong Kong, Australia. If you don’t live in these countries and like to order, please contact us first before making a purchase. We offer Free International Shipping as long as we can send antique Japanese swords by EMS. 

 We normally ship by EMS(Express Mail Service) provided by Japan Post. We will send you a tracking number for your order as soon as we hand it to the post office. We will put 100 % insurance on the shipping document without any extra charge. Based on the total amount, there might be a duty tax or other fee for you to pay, depending on the countries. We use package cushioning to protect the item and put it in a PVC pipe, which is one of the most secure packages because of its durability.

 It will normally takes 5-14 days for the item to arrive at your given address after we dispatch it. Time of delivery is estimated as accurately as possible by the carrier but does not take into account any delays beyond our control such as by inclement weather, post office holiday seasons.

* If you live in Australia and like to purchase an authentic Japanese sword, please click here to know the detail.

* If you live in the UK and like to purchase an authentic Japanese sword, please contact us first and click here to know the detail.

 Here is one of the reviews we received from a customer who purchased an authentic Japanese sword from us. For more reviews, please click here.
“My experience overall with the whole process was wonderful. I had many questions about the history and process to purchase these treasures. All my questions were answered very timely and complete. The staff is very knowledgeable and very well versed if any questions do arise.”

【How to make sure the condition】
 Please keep in mind that what you are going to purchase is an antique item. We uploaded high resolution photos for you to check its condition thoroughly. If you like to see more photos with different angles, please feel free to contact us. We will be happy to send them to you so that you can make informed decision. It is essential for us to know that you are happy with your choice of a sword. and we are prepared to use the best of our ability to serve you.

【How To Contact Us】
 Please contact us through email, Facebook Messenger or Live Chat if you have any questions. You can find each icon on the right side of the website. Please click one of them to reach us. We will reply to you within 1-2 business days.

The Art of Nihonto (Japanese Sword)
 Samurai’s history is a profound, eloquent legacy of ancient Japanese warriors in which millions of people worldwide are being fascinated. If you like to find out the art of Nihonto, please click here.

A Guide to Japanese Sword Maintenance
 After acquiring an genuine Japanese sword, it is also important to know how to take good care of it. Here is the special video for you. Mr. Paul Martin, Japanese sword expert, shows you how to give proper maintenance to your sword. By mastering how to clean the Japanese sword, its aesthetic beauty will last forever.

 When you purchase a Japanese sword from us, you can get a Free Japanese sword maintenance kit. It comes with four tools(Choji Oil, Uchiko Whetstone Powder, Peg remover, Oil Applicator). By watching the video instruction above , you can enjoy learning how to maintain your Japanese sword while appreciating it. If  you have any difficulty assembling the sword or cleaning the blade, you can feel free to contact us.







 Thank you for reading all the information on the page. If you have any difficulty choosing the right Japanese sword for you, we will be more than happy to help you find the one that speaks to you the most. Please feel free to contact us.

In stock

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