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Updated: 8 Mar 2021


Antique Japanese Sword Katana Signed by Yasutoshi
NBTHK Tokubetsu Hozon Certificate


DELIVERY TIME : Approx. 1-1.5 months
*There might be delay in shipment depending on countries

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

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

Category Katana( KOTO)
Age Late Muromachi Period:450-500 years old
Swordsmith Naminohira Yasutoshi(波平安利)
Certificate NBTHK Tokubetsu Hozon Certificate
Location Satsuma(Today’s Kagoshima)
Blade Size Length: 69.8 cm ( 27.5 inches), Curvature:2.0 cm(0.79 inches)

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


Antique Japanese Sword Katana Signed by Yasutoshi with NBTHK Tokubetsu Hozon Certificate 


Naminohira(波平) was a family of swordsmiths that the Yamato-Den swordsmith Masakuni(正國) originated in Satsuma(薩摩) province during the late-Heian period. Swords by Naminohira before the late-Nambokucho period are referred to as Ko-Naminohira, as opposed to the family’s later work, Sue-Naminohira. They were known for having their titles with one of these letters, 行(Yuki) or 安(Yasu).

The Naminohira swords were cherished among Samurais in the marine army, especially because the name Naminohira(波平) means “Tides are quiet.” in Japanese.
The origin of the title Naminohira dates back to the family’s foundation when the founder Masakuni calmed the waves by dedicating his sword to the sea when his family from Yamato sailed to live in Satsuma. Since then, he began to wear the title “Naminohira Yukiyasu (波平行安)” – “Tides are quiet, ’tis an easy way.” From the late-Heian period until the end of Samurai times, the Naminohira family had kept the mastership for a thousand years.

Yasutoshi was a swordsmith from the Naminohira family back in the late-Muromachi period. He would like to apply the authentic Yamato-Den techniques in his craft. His work appears to have features that derive from Yamato-Den; The razor-edge sharpness and exceptional strength.
Satsuma province had many Samurais and smiths back in the day, making it difficult for most smiths to stay relevant through the era. The Naminohira family always remained prominent in the evolving sword industry – and their work is still beloved by Katana fans to date.

It is appraised as Tokubetsu Hozon certificate issued by NBTHK. This authentication paper was only given to Japanese swords, especially worth preserving by Nihon Bijutsu Touken Hozon Kyokai(the Society for the Preservation of the Japan Art Sword). This sword comes with a beautiful set of Koshirae(decorative sword mounting).

【 Blade】
Cutting Edge Length(Nagasa)69.8 cm ( 27.5 inches)
Curvature(Sori)2.0 cm(0.79 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


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(Sabbard), Tsuka( Handle), Tsuba(Handguard).


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

 The lion and peonies are designed for this Fuchi Kashira. This combination is a popular motif that has been appreciated since ancient times. According to a theory, this design was started to be used in the Kamakura period (1185-1333) in Japan. People thought lions had the power of the sun so that this animal would exorcize evil spirits. Also, it is said peony represents happiness, wealth, nobleness, and gorgeousness. This Fuchi Kashira is decorated with auspicious motifs. 

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

 It might be dragons that are designed for this Menuki. It looks like they twist their scaly elongated bodies. Initially, the dragon is an imaginary creature that is found in ancient Chinese traditions or myths. Its body is likened to nine animals: antlers are deer, the head is a camel, eyes are demons, the neck is a snake, belly is Mizuchi (蛟, mythical animal in Japan which looks like a snake and have a horn and four legs), scales are fish, claws are falcons, palms are tigers, and ears are cows. It was thought that the dragon would reign at the top of all animals because of its odd-looking appearance. Since ancient times, this beast pattern has been appreciated as an auspicious symbol.

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. 

 Yotsu-Mokkou-shaped Tsuba made from iron. Three people who voyage together are depicted. It seems they are looking up the moon that is engraved on the left upper side. This Tsuba might describe a scene of some narratives.

Saya Saya is the scabbard for the Japanese sword.  

Authentication PaperNBTHK TOKUBETSU Hozon Certificate for the blade

 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 June 25th in the second year of Reiwa(2020). 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 : Tokyo 299379
  The Board of Education in Tokyo prefecture issued a registration paper for this sword . In order to obtain this paper, the sword needs to be traditionally hand forged. With this paper, its owner can legally own an authentic Japanese sword in Japan.



【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 300 Japanese swords 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. 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, EUR or GBP. The price is set in Japanese Yen. Prices in other currencies are automatically calculated based on the latest exchange rate.

  We have shipped authentic Japanese swords to the USA, Canada(BC, AB,ON), Mexico, Australia, UK, Germany, France and Hong Kong. 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 either EMS or UPS(USA only).

  We normally ship by EMS(Express Mail Service) provided by Japan Post.When we receive an order from the USA, we will use UPS instead as EMS temporarily stops shipping from Japan to the USA due to COVID-19.

  We will send you a tracking number for your order as soon as we hand it to the post office/UPS. We will put 100 % insurance on the shipping document without any extra charge. Based on the total amount, there might be a duty tax 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.

*Please keep in mind that due to the spread of COVID-19, there might be delays in shipping. If you like to know the detail about shipping, please feel free to ask us.

【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.

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. When you purchase a Japanese sword from us, you can get a Free sword maintenance kit, which appears in this video.

If you like to see more antique Japanese swords for sale, please check the link.



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