O-suriage – Study of Japanese Sword

August 27, 2019December 11, 2025 Yurie Endo 遠藤由利江 64|Part 2 pf - - - 28 Main 7 Area Among shin-To Sword (part A), Uncategorized

61|Part 2 of — 27 Shin-to Main 7 Regions (part A)

Chapter 61 is a detailed part of Chapter 27, Shinto Main 7 Regions (part A). Please read Chapter 27 before reading this section.

0-timeline - size 24 Shin-to The red circle above indicates the time we discuss in this section

Chapter 27, Shin-to Main 7 Regions (Part A), and Chapter 28, Shin-to Main 7 Regions (Part B), describe an overview of the seven main regions. This chapter and the next chapter show photos of representative swords from these regions. They are Yamashiro (山城, in Kyoto), Settsu (摂津, today’s Osaka), Musashi (武蔵, Edo), and Satsuma (薩摩, Kyushu). However, Echizen (越前), Kaga (加賀), and Hizen (肥前) are omitted.

29 Map with number 7

With ko-to swords, features such as the condition of the hamon, kissaki size, length, and shape of the nakago, etc., indicate when the sword was made. During the ko-to period, Bizen swordsmiths produced Bizen-den swords, Yamashiro swordsmiths made Yamashiro-den swords, and Mino swordsmiths made Mino-den swords. However, during the shin-to period, that is not the case. The den and the swordsmith’s location often do not match. For shin-to swords, we study the swordsmiths and swords from the seven main regions along with their characteristics.

Regarding swords made during the ko-to period, if a sword has a wide hamon line with nie, usually, its ji-hada shows a large wood grain or a large burl grain. Also, when you see a narrow hamon line, it typically features a fine ji-hada.

However, with shin-to swords, if a sword shows a wide hamon with nie, it often has a small wood grain or small burl grain pattern on ji-hada. If it has a narrow hamon line, it may have a large wood grain pattern on the ji-hada. This is a shin-to characteristic.

Here is an exception: some early Soshu-den swords from the late Kamakura period may show a wide hamon with nie, which has small burls on the ji-hada. Because of that, whether it is ko-to or shin-to can be confusing. Even so, other features such as ji-hada or other parts should indicate whether it is shin-to or ko-to.

Yamashiro (山城: Kyoto)

Horikawa Kunihiro (堀川国広) From Sano Museum Catalogue (permission granted)

Horikawa Kunihiro (堀川国広)

Horikawa Kunihiro was regarded as a master swordsmith among shin-to swordsmiths. He forged swords in many styles with various characteristics. The hamon types are o-notare, o-gunome, togari-ba (pointed hamon), chu-suguha with hotsure (frayed look), hiro-suguha with a sunagashi effect, inazuma, and kinsuji. Kunihiro preferred to shape his swords to resemble an o-suriage (shortened Nanboku-cho style long sword). Kunihiro‘s blades give a powerful impression. Kunihiro‘s swords often feature beautiful carvings; designs include dragons, Sanskrit letters, and more. Because he created swords in many different styles, there is no general characteristic that defines his work other than the hamon mainly being nie. His ji-hada is finely forged.

Iga-no-Kami Kinnmichi (伊賀守金道) Dewa Daijyo Kunimichi (出羽大掾国路) Both Juyo Token (重要刀剣), once my family owned, photos were taken by my father.

Iga-no-Kami Kinmichi ( 伊賀守金道)

The Kinmichi family is called the Mishina group. Refer to 27 Shinto Main 7 Regions Part A. Iga-no-Kami Kinmichi was awarded the Japanese Imperial chrysanthemum crest.

The characteristics of Kinmichi ——– Wide sword, shallow curvature, an extended kissaki, sakizori (curvature at 1/3 top), a wide tempered line, kyo-yakidashi (see 27 Shinto Main 7 Regions A ), hiro-suguha (wide straight hamon), o-notare (large wavy), yahazu-midare, hako-midare (refer to 24 Sengoku Period Tanto). Mishina-boshi, refer to 27 Shin-to Main 7 Regions A. Fine wood burl, masame appear in the shinogi-ji area.

Dewa Daijo Kunimichi (出羽大掾国路)

Dewa Daijo Kunimichi was the top student of Horikawa Kunihiro. The right photo above. Like Kunihiro, the sword resembles a shortened Nanboku-cho sword. Shallow curvature, a wide body, a somewhat elongated kissaki, and fukura-kareru (less arch in fukura). Wide tempered lines, large gunome, nie with sunagashi, or inazuma shows. Double gunome (two gunome side by side) appears. Fine ji-hada.

Settu (摂津) Osaka (大阪 )

Settu (Osaka) is home to many famous swordsmiths. They are Kawachi-no-Kami Kunisuke (河内守国助), Tsuda Echizen-no-Kami Sukehiro (津田越前守助広), Inoue Shinkai (井上真改), and Ikkanshi Tadatsuna (一竿子忠綱), among others. The main characteristic of the Settsu (Osaka) sword ——– The surface is beautiful and fine, almost like a solid surface with no pattern or design. The two photos below are of the Settsu sword.

Ikkanshi Tadatsuna from the Sano Museum Catalogue. Permission granted to use.

Ikkanshi Tadatsuna (一竿子忠綱)

Ikkanshi Tadatsuna was famous for his carvings. His father was also a well-known swordsmith, Omi-no-Kami Tadatsuna (近江守忠綱). Consequently, he was known as Awataguchi Omi-no-Kami Fujiwara Tadatsuna (粟田口近江守藤原忠綱), as shown in the nakago photo above.

The characteristics of Ikkanshi Tadatsuna ——-A longer kissaki and a wide-tempered line with nie. The Osaka yakidashi (transition between the suguha above machi and midare is smooth. Refer to 27 Shin-to Sword – Main 7 Regions (Part A) for details on Osaka yakidashi. O-notare with gunome, komaru-boshi with a turn back, and very fine ji-hada with almost no pattern on the surface.

Inoue Shinkai (井上真改) from “Nippon-to Art Swords of Japan” The Walter A. Compton Collection

Inoue Shinkai (井上真改)

Inoue Shinkai was the second generation of Izumi-no-Kami Kunisada (和泉守国貞), who was a student of Kunihiro. The characteristic of Inoue Shinkai’s swords —————- Osaka yakidashi, the tempered line gradually widens toward the top. O-notare and deep nie. Very fine ji-hada with almost no surface design.

March 25, 2019December 6, 2025 Yurie Endo 遠藤由利江 50| Part 2 of -----15| Late Kamakura Period Sword, Uncategorized

48|Part 2 of — 14|Late Kamakura Period Sword : Early Soshu Den (鎌倉末刀）

This is a detailed section of Chapter 14| Late Kamakura Period Sword. Please read Chapter 14 before this part.

0-timeline - size 24 Late Kamakura

The red circle above indicates the time we discuss in this section.

14 Ikubi kissaki Damadge

In Chapter 14, “Late Kamakura Period Sword (鎌倉末太刀),” the ikubi-kissaki sword is explained. The illustration above shows a flaw caused when the damaged area was repaired. To compensate for this flaw, swordsmiths developed a new sword style during the late Kamakura period. They forged swords with a longer kissaki and lowered the tip of the hi below the yokote line. This way, if the yokote line were lowered during repairs, the tip of the hi would remain below the yokote line.

15 Masamune (Sano) 15 Masamune hamon (Sano)

The above photo shows a sword by Goro Nyudo Masamune (五郎入道正宗). Please observe the size and shape of the kissaki. This differs from the previous ikubi-kissaki and ko-gissaki styles. This style represents a typical late Kamakura period kissaki style. It is o-suriage (a largely shortened form).

Under the Kamakura Bakufu, many swordsmiths moved to Kamakura. They were Toroku Sakon Kunituna (藤六左近国綱) of the Yamashiro Awataguchi group (山城粟田口), Fukuoka Ichimonji Sukezane (福岡一文字助真), and Kunimune (国宗) from the Bizen area. They were the origin of Soshu-den (相州伝). Eventually, Tosaburo Yukimitsu (藤三郎行光) and his famous son, Masamune (正宗), emerged. In the drawing above, kinsuji and inazuma are shown within the hamon. The shining lines inside the hamon are inazuma and kinsuji. Inazuma and kinsuji are collections of nie. Masamune is well-known for his inazuma and kinsuji. He lived in Kamakura, a seaside town, and his hamon resembles ocean waves when viewed from the side.

50 part 2 of 15 吉岡.photo

The picture above shows a sword made by the swordsmith Yoshioka Ichimonji group (吉岡一文字). The kissaki resembles one of Masamune’s swords. It is longer than the previous ikubi-kissaki or ko-gissaki. This is chu-gissaki. The kissaki, like this, is one of the key points in determining the period when the sword was made. The hamon has choji, gunome, togariba (pointed tip), and very tight nie.

50 part 2 of 15 運生 photo

The photo above shows a sword by Ukai Unsho (鵜飼雲生) from Bizen-den. This sword is also from the late Kamakura period, but it has a ko-gissaki. This sword does not have the late Kamakura period chu-gissaki style. Narrow hoso-suguha are more characteristic of an earlier time than the late Kamakura period. This sword indicates that swords do not always exhibit the style of their period. To kantei*: first examine the style and shape, then give yourself an idea of the period it was made in. However, the kissaki in this case does not indicate the late Kamakura period. The next step is to look at the various characteristics of the sword one by one, such as the hamon, nie or nioi, ji-hada, etc., to determine the period, the den, and the province, and then come up with the name. This process is called kantei.

*Kantei – the process of identifying a swordsmith’s name by analyzing the sword’s characteristics without seeing the mei (the inscribed smith’s name). The mei might be gone if it has been shortened. All the photos above are from the Sano Museum Catalogue. Permission to use them is granted.

April 14, 2018November 25, 2025 Yurie Endo 遠藤由利江 22| Muromachi Period Sword, Uncategorized

21| Muromachi Period Sword (室町時代刀)

0-timeline - size 24 Muromach

　　　　　　　The red circle above indicates the time we discuss in this section

The Muromachi period was a relatively peaceful and prosperous time until shortly before the “Onin-no-ran,” which occurred at the end of the Muromachi period. Refer to Chapter 20, Muromachi Period History (室町時代歴史). The Nanboku-cho style long swords became outdated; as a result, they were shortened. The shortened blade is called suriage. Overall, the Muromachi period was a declining time for sword-making.

Tachi and Katana

Until the end of the Nanboku-cho period or the beginning of the Muromachi period, samurai wore swords suspended from their waists with the blade facing down. When a sword was worn this way, the swordsmith inscribed his name on the side facing outward, meaning the blade is on your right when you see the inscription. In this case, the sword is called a tachi.

During the Muromachi period, a sword was worn between the belt, with the blade facing up. The swordsmith inscribed his name so that it faced outward when it was worn. Therefore, when you see the inscription, the cutting edge is to your left. This is classified as a katana.

Around the beginning of the Muromachi period, samurai started to wear a pair of swords called dai-sho (大小), meaning large and small. The longer sword is a katana, and the shorter one is a wakizashi. In general, a tachi is longer than a katana. A katana is longer than a wakizashi, and a wakizashi is longer than a tanto. Here is the order of their lengths.

Tachi > Katana > Wakizashi > Tanto Tachi and katana differ in how they are worn, not in length.

O-suriage ( 大磨上: Katana shortened by great length)　

How much the sword should be shortened depends on its original length and how much the owner wants it shortened. O-suriage is a type of sword that is significantly shortened. Once the blade is shortened by that length, the inscription of the maker’s name is cut off. When the Hon’ami family (本阿弥家, a family of sword connoisseurs who have appraised Japanese swords for generations from the Muromachi period to today) appraises such a suriage sword, they write the make of the sword and the swordsmith’s name on the front side of the hilt, and the connoisseur’s name with his kaou (similar to a signature) on the back. There are several levels of writing. The level at which it should be done depends on the sword’s quality and the owner’s preference. Below is the order of levels (high to low).

Shu-Mei (朱明 )————————————————————-name written in Vermilion Kinpun-Mei (金粉名 )———————————————–name lacquered in gold powder Gin-Zougan (銀象嵌 )————————————————————name inlaid in silver Kin-Zougan (金象嵌 )————————————————————-name inlaid in gold

Sugata (姿: Shape) ——— The average length is typically two feet three to four inches (68~71cm). The shape of the Muromachi period katana is somewhat similar to that of the Heian period tachi. However, Muromachi katana are less grand or graceful than those from the Heian period swords. The curvature is usually of the koshizori style. Koshizori refers to the highest curvature being near the lower part of the blade. The length and shape are suitable for wearing between the body and the belt. The width and thickness are well-balanced with the size of the sword. Small kissaki.

22 Muromachi sword shape

Hirazukuri-Wakizashi ———– Hirazukuri refers to a flat surface without a shinogi or yokote line. Usually, it is 1 foot and 1 to 2 inches long. No curvature. Hirazukuri-wakizashi appeared during the Muromachi period.

Hamon (刃文: tempered line) ———————- Nioi base. The tempered area is well balanced with the blade’s width. Koshi-hiraita-midare is mixed with choji-midare.

22Hamon (Koshi Hiraita midare) — from Sano Museum Catalogue (permission granted)

Boshi (Tempered line at Kissaki area) ————– Midare-komi, a short turn back. See the above illustration. Midare is an irregular wave-like pattern.
Ji-hada (地肌: An area between the tempered line and Shinogi)- Soft look, a large wood grain pattern, Ji-utsuri (faint smoke or cloud-like effect) shows.
Horimono (彫物：Engravings) ———- Bo-hi (single groove), Soe-hi (a thin groove alongside the main hi), Futasuji-hi (double narrow groove), Sanskrit, Tokko-tsuki ken, Tsume-tsuki Ken, name of God, and dragon. Carvings became elaborate.

8 Hi, Suken, Bonji 21 Tsume-tuki-ken tokko with caption

Sword Smiths during Muromachi Period

Bizen Den ——–Osafune Morimitsu (長船盛光), Yasumitsu (康光), Moromitsu (師光)
Yamashiro Den————————————————-Yamashiro Nobukuni (山城信国)

21 Muromachi sword from Sano

Ise Masashige (伊勢正重), Bizen Osafune Naomitsu (備前長船尚光) Juyo Token(重要刀剣) Sano Museum Catalogue (permission granted) once my family sword

March 10, 2018December 15, 2025 Yurie Endo 遠藤由利江 19| Nanboku-Cho (North and South dynasty) Period Sword, Uncategorized

18| Nanboku-Cho Period Sword (南北朝太刀）

The circle indicates the time we discuss in this section

During the Nanboku-cho period, samurai sought large, elaborate, impressive, yet practical swords. The Soshu-den style sword from Nanboku-cho time was just that. This was the most popular style at the time. The Nanboku-cho period marked the peak and height of the Soshu-den sword. Many swordsmiths moved from other provinces to the Kamakura area and forged Soshu-den style swords. Other schools and provinces outside the Kamakura area also produced Soshu-den-style swords in their own areas.

19 Nanboku-cho Sword style

Sugata (姿: Shape) —————–The original length of a sword ranged from three to five feet, but it was later shortened to about two and a half feet. A significantly shortened blade is called o-suriage.

The Nanboku-cho style sword features shallow kyo-zori (also called torii-zori). Refer to Chapter 5, Heian Period Sword. The highest curvature occurs around the middle of the body. It has a wide body, high shinogi, narrow shinogi-ji (Chapter 3, Names of parts), and thin kasane (blade thickness), which are distinctive features of the Nanboku-cho style. High gyo-no-mune or shin-no-mune, and sometimes a maru-mune (round back).

19 Nanboku-cho 3 kinds Mune

Hi (樋: groove) and Horimono (彫刻: engraving) ——– Often, a single hi (bo-hi), double hi, suken (dagger), Bonji (Sanskrit), and/or dragon are engraved on the shinogi-ji area. Refer to Chapter 3, Names of Parts.

9 Hi, Suken, Bonji

Hamon (刃: Tempered line) —- The lower part of the body exhibits a narrow-tempered line; gradually, this line becomes wider and showier. Course nie. O-midare (large, irregular, wavy hamon), Notare-midare (wavy, irregular hamon), and Gunome-midare (a combination of repeated half-circular and irregular hamon). Inazuma and kinsuji (see Chapter 14, Late Kamakura Period Sword) sometimes appear.

*From Sano Museum Catalogue ( Permission granted).

Ji-hada (地肌: the area between the shinogi and the tempered line) ———————-Wood-grain pattern (itame 板目). Sometimes tobiyaki (patchy tempered spots) appear on ji-hada. For ji-hada, refer to Chapter 3, Names of Parts.

Kissaki (切っ先) and Boshi (tempered line at the kissaki area) ———- O-kissaki (long and large kissaki). Fukura kareru (less arc kissaki). Midare-komi (the body and boshi have a similar tempered pattern), with kaeri-fukashi (hamon deeply turns back), and sometimes hitatsura (entirely tempered). See the illustration above.

Sword-smiths during Nanboku-Cho Period Soshu Den (school)

From Soshu—————————————————Hiromitsu (広光) Akihiro (秋広) 　
From Yamashiro ———————————————Hasebe Kunishige (長谷部国重)
From Bizen (called So-den Bizen)——-Chogi (長儀 )group Kanemitsu (兼光 ) group
From Chikuzen ———————————————————-Samoji (左文字 ) group

Chogi (長義）from The Sano Museum catalog. Permission to use is granted

The distinctive characteristics of the Nanboku-Cho period sword in the photo above

The trace of an engraving of suken on the inside of the nakago indicates that this area was once a part of the main body.
Large and long kissaki

February 4, 2018December 15, 2025 Yurie Endo 遠藤由利江 15|Late Kamakura period

14| Late Kamakura Period Sword (鎌倉末太刀)

0-timeline - size 24 Late Kamakura

The red circle above indicates the time we discuss in this section

The beginning of the Soshu style

A new sword style called Soshu-den appeared after the Mongolian invasion during the later part of the Kamakura period. The Kamakura region became prosperous under the rule of the Hojo family (北条). Many swordsmiths moved to Kamakura. These included the Kunitsuna group (国綱) from the Yamashiro area and Fukuoka Ichimonji Sukezane (福岡一文字助真) and Kunimune (国宗) from the Bizen area. They are the originators of Soshu-den (相州伝). A well-known swordsmith, Goro-Nyudo-Masamune (五郎入道正宗), emerged during this time.

15 Soshu sword with explanation

Sugata (Shape 姿) ——- O–kissaki (large kissaki: 大切先) and chu-kissaki (medium kissaki: 中切先). The tip of the hi ends lower (see the illustration below). Hamaguri– ha is no longer in style. The body has become thinner. The original length was approximately three feet or longer, but most were later shortened to two feet, three inches, or four inches. The shortened sword is called o-suriage (大磨上).

15 Kissak shape of 4

14 Hi end lower

Hamon——————–Ｎarrow Hamon and wide Hamon.

Narrow Hamon ——- A mix of Suguha (straight), Ko-choji (small clove-like pattern), and Ko-gunome (small half-circle pattern). Small Nie base. (shown below)

10 Nie & Nioi

Wide Hamon ——– Notare midare (wavy). O-gunome. Nie base. Ashi-iri (short line toward the blade, the right drawing below). Inazuma (lightning-like line) or kinsuji (bright line) may appear on a tempered line. However, inazuma and kinsuji require trained eyes to detect. It is difficult for beginners to see inazuma or kinsuji.

15 Late Kamakura Soshu Hamon

Boshi————The main body and boshi have the same type of hamon. At the tip of the kissaki, angle it back slightly or yakizume. You might also see o-maru (large round), ko-maru (small round), kaen (flame-like), or nie-kuzure. Yakizume and kaen (Chapter 12).

15 three boshi name

Ji-hada (between the shinogi and the tempered line) ——-Strong ji-nie (地沸), which are sand-like small dots appearing on the ji (between the tempered line and the mune). Yubashiri (a cluster of ji-nie), kinsuji (a bright, radiant line formed by nie), inazuma (a lightning-like irregular line), or chikei (similar to kinsuji) may appear on the ji-hada.

15 Yubashiri, Chikei, Inazuma

Late Kamakura Period Soshu School Sword Smiths

From Bizen————–Fukuoka Ichimonji Sukezane (福岡一文字助真) Kunimune (国宗 ) From Yamashiro ————————————–Toroku- Sakon- Kunituna (藤六左近国綱)

The three swordsmiths mentioned above originated the Soshu-den (school) in Kamakura. Later, Tosaburo Yukimitu and his son, the famous Goro Nyudo Masamune, emerged.

More Soshu Den swordsmiths other than above

From Yamashiro (山城)———- Rai Kunitsugu (来国次), Hasebe Kunishige (長谷部国重) From Etchu (越中) province ———————Gou- no-Yoshihiro (郷義弘) Norishige (則重) From Mino (美濃) province ——————————————-Kaneuji (兼氏) Kinjyu (金重) From Chikuzen (筑前) province —————————————————-Samoji (左文字)

Goro Nyudo Masamune (正宗): his hamon is like ocean waves. (Sano Museum permission granted)

Masamune (政宗） Yoshioka Ichimonji （吉岡一文字）

Once owned by my family