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Updated: 25 Feb 2024


Antique Japanese Sword Katana Signed by Sadasuke
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, UK, Canada, Mexico, Germany, Hong Kong, France, 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 (1624-1644)
Swordsmith Sunshu Shimada Jyu Mikawa no Kami Minamoto Sadasuke
Certificate NBTHK Tokubetsu Hozon Certificate
Location Suruga Province(Shizuoka prefecture)
Blade Size Cutting Edge Length : 69.2 cm (27.2 inches)
Curvature: 1.0 cm (0.39 inches)

Thank you for visiting our website. This sword was sold as each antique Japanese sword is one of a kind. However, we might be able to show you something similar because we have various types of swords available. Also, there are ones that aren’t listed on the website yet. Our customer service will help you find your ideal blade you will cherish for generations. Please feel free to contact us or check the list of swords. We will be more than happy to help you.


Antique Japanese Sword Katana Signed by Sadasuke with Tokubetsu Hozon Certificate 



 This blade was signed by Sunshu Shimada Jyu Mikawa no Kami Minamoto Sadasuke (駿州嶋田住参河守源貞助). Sadasuke was active during the early Edo period (Early Edo Period:1624-1644). He belonged to Shimada school, a prestigious school located in Suruga domain (Today’s Shizuoka prefecture). Sunshu is another name for Suruga Domain. Shimada is the name of the town he lived. Mikawa no Kami is an official title given by the imperial court for his excellent craftsmanship. 

 Shimada school was founded by Yoshisuke (義助) during the mid-Muromachi period and lasted by the late Edo period. The group of Shimada swordsmiths resided in Shimada city, Suruga province (today’s Shizuoka prefecture). Other famous swordsmiths from this school are Sukemune, Hirotsugu, and Sadahiro.

 The first-gen Yoshisuke was active during the Kosho era(1455-57). It is said that the first-gen Yoshisuke was a descendant of Bizen Ichimonji Sukemune, one of the most famous swordsmiths in Japanese history. The first-gen Yoshisuke served a powerful feudal family named Imagawa. It is said that he received his maker’s name 義 from Imagawa Yoshitada.

  Shimada school interacted with other schools in Soshu swordsmiths living near Odawa castle in Kanagawa prefecture. The Suruga domain was vital for strong feudal lords such as Takeda, Tokugawa, and Hojo clans during the Sengoku Jidai(Warring state period: Late Muromachi period). The swordsmiths in Shimada school received many orders from these powerful feudal families. The first-gen Yoshisuke had mastered excellent craftsmanship, and it was passed down to other members of Shimada swordsmiths. And the school flourished during the Muromachi-Edo period.

Soshu Den

 Swordsmiths residing in Soshu province (Today’s Kanagawa prefecture) used a particular sword-forging tradition called Soshu Den. And, Shimada school also used this tradition to forge blades. Shoshu Den was born in the middle of the Kamakura period (mid 13th century). Back then, the Yamato and Yamashiro traditions were highly developed, and there were a few renowned swordsmiths from those regions. However, the sword-forging practice was in its infancy in the Kanto area, where the Soshu region was located.

 At the beginning of the Kamakura government, which was established in 1185, the first Shogun, Minamoto Yoritomo, prioritized making a lot of rules to have its political stability. And he couldn’t afford to hire swordsmiths within the same region or train them. Therefore, the Kamakura government originally ordered weapons to the swordsmiths in the other areas, such as Yamato and Yamashiro.

 But, since the government was established, the demand for weapons increased exponentially in the government, and they had to figure out how to meet those demands from Samurai who served Kamakura shogunate. Then, the 5th head of the Shogun, Hojo Tokiyori, invited two renowned swordsmiths from other parts of Japan. They were Awataguchi Kunitsuna from Yamashiro province and Bizen Saburo Kunimune from Bizen province. And the 7th-gen Shogun Koreyasu Shino also invited Fukuoka Ichimonji Sukezane from Bizen province.

 It is said that those three swordsmiths played an essential role in creating the Soshu Den and making the foundation of the Soshu Den. Also another famous figure in the Soshu den is Intou Kunimitsu, an adopted son of Awataguchi Knitsuna. And Kunimitsu passed his excellent craftsmanship to Yukimitsu, his apprentice. And Masamune, one of the most famous swordsmiths in Japanese history, was an apprentice of Yukimitsu.  And Masamune was the one that brought Shoshuden to nationwide fame. The tradition Masamune completed became an example of other swordsmiths who learned Soshu Den. Also, Soshu Den influenced many renowned swordsmiths during the Koto- Shinto era. One of examples is Inoue Shinkai from Osaka and Suishinshi Masahide from Edo.


 It is appraised as a Tokubetsu Hozon Touken (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 is a couple of minor Kitae Kizu on this blade. If you like to know the detailed condition, please feel free to contact us.


【 Blade】
Cutting Edge Length (Nagasa): 69.2 cm (27.2 inches)
Curvature (Sori): 1.0 cm (0.39 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.


Nakago: Nakago 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.


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


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

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

 We are still determining the motif of this Menuki. We would like to offer some possibilities. The first view is that a Kasa (笠, hat) is designed here. A theory says that a Kasa, especially the Kakure-Gasa (隠れ笠), would protect us from danger or illness. And this item is included in the Takaradukushi (宝尽くし, a combination of several treasures) theme.

 Another idea of this Menuki’s motif is the Dōkyō (銅鏡, copper alloy mirror). It functioned as a religious and ritual tool and was widely used until modern times when glass mirrors were introduced from the West and became famous. In Japan’s modern times, bronze mirrors and other items remained as wedding tools for feudal lords and others. Mirrors are objects of Shinto belief in Japan. Therefore, we assume it is possible that such religious tools were incorporated in designs.

Tsuba and Habaki: Tsuba 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. 

 The theme of this Tsuba is the Sansui Zu (山水図). The Sansui Zu is a landscape painting that depicts mountains and watersides. The front side of this Tsuba depicts a mountain landscape, and the reverse portrays a waterside landscape. In the close-up view of the front, we could see the figures of people crossing the bridge.

 The Sansui theme has existed since the Asuka period (592-710) and has been produced. The Chinese landscape painting styles inspired it. However, this theme became particularly popular after it was brought to Japan from the continent by Sougen (宋元) in the Kamakura period. The natural scenery is elaborately expressed in the Sansui Zu: mountain ranges, towering rocky mountains, flowing down waterfalls, and the gentle curves of the river, for example. Human characters are sometimes described together, as seen in this Tsuba. Some themes treat a scene from a story, legend, or folklore.


Saya: Saya is the scabbard for the Japanese sword.  

Authentication Paper: NBTHK TOKUBETSU Hozon Certificate for the blade (No. 142604)

  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 October 2nd in the 9th year of Heisei (1997). 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 271710

 The Board of Education in Tokyo prefecture issued a registration paper for this sword . It is called Jyu Hou Token Rui Tourokusho (銃砲刀剣類登録証). 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, UK, Canada, Mexico, Germany, France, Hong Kong and 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.

 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.


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