19|Nanboku-Cho (North and South dynasty) Period Sword

18 Nanbokucho time line

                           The circle indicate the time we are discussing in this section

During Nanboku-Cho period, Samurai demanded large, elaborate and practical swords. Soshu Den style — elaborate, large, and impressive  —became the most popular style. Nanboku-Cho period was the height of the Soshu Den.  Many sword smiths moved to Kamakura and forged Soshu Den style swords.  Other schools and provinces also made Soshu Den style swords in their own places.

19 Nanboku-cho Sword style

 

Shape (Sugata 姿)—-Originally the length of the swords were 3, 4, 5, feet long, but shortened to approximately two and a half feet in the later time. Shortening a sword greatly is called O-Suriage.  Nanboku-Cho sword has a shallow Kyo-zori (also called Torii-zori) shape (refer 6. Heian period)highest curvature comes around the center of the body.  Wide body, high Shinogi, and narrow Shinogi-Ji (refer 4 Names of parts) and thin body.  High Gyo-no-Mune or Shin-no-Mune, sometimes Maru-Mune (round back).

19 Nanboku-cho 3 kinds Mune

Hi, Horimono (groove and engraving 樋, 彫刻)—– On Shinogi-Ji (refer 4 Names of parts) area, often appears Bo-hi (one groove), double hi, Bonji (Sanscrit), spear, Dragon engraved

9 Hi, Suken, Bonji

Hamon (Tempered line) —– Lower area of the body shows narrow tempered line, higher area of the body shows wider showy tempered line.  Course Nie.  O- Midare (large irregular), Notare-Midare (wavy irregular), Gunome-Midare (repeating pattern of half circular and irregular mix).  Inazuma, Kinsuji (refer 15 Late Kamakura Period sword) action appears

 

19 Hamon Notare 319 Mamon choji gunome

*From Sano Museum Catalogue ( Permission granted).

 

Jitetu or Jihada (between tempered line and Shinogi) (4 Names of parts)——Wood grain pattern (Itame 板目). Tobiyaki (patchy tempered spot in jihada) appears.

Boshi, Kissaki —– O-Kissaki (Stretched long Kissaki). Fukura kareru (no Fukura). Midare-Komi (tempered line continues into Boshi), with kaeri fukashi (look at the illustration above),  sometimes Ichimai (tempered entire Boshi).  Look at the above illustration.

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

From Soshu————————————————————Hiromitu (広光) Akihiro (秋広  ) From Yamashiro ————————————————–Hasebe Kunishige (長谷部国重)  From Bizen (called So-den Bizen)————-Chogi (長儀 )group, Kanemitu (兼光 ) group From Chikuzen —————————————————————Samoji (左文字 ) 19 Chogi photo from Sano book

10 | Middle Kamakura Period — Bizen School(鎌倉中期備前伝)

There are large numbers of swordsmiths in Bizen (備前) school during the Heian period but their sword style is generally similar to Yamashiro school, called Ko-Bisen (古備前). The real Bizen school style started from Middle Kamakura period.  Bizen province had many ideal conditions to produce swords.  It produced good quality steel and a large amount of fuel around the area and also the transportation was convenient.  Naturally, large numbers of swordsmiths gathered in this area and produced swords in quantities.  Because of that, to connoisseur Bizen sword is difficult.  Bizen sword has a higher standard.

Generally speaking, the next three characters are the most distinctive features of Bizen school.

  • Nioi base temper line (Nie is sand like small dots on a tempered line, Nioi is finer dots than Nie, so small, it looks as if a line)  Technically speaking, those two are the same.  See the illustration below.
  • Jigane (sword steel) looks soft.
  • Reflection appears on the surface.

10 Nie & Nioi

Sugata (shape) — Length of the sword is about 33 inches ± a few inches. The width of the blade is slightly wide and it has stout look.  The curvature of the blade is Koshizori (腰反)  means the highest curvature comes lower part.  The body has average thickness.  Small kissaki.

10 Middle Kamakura ---備前刀姿

Horimono(engraving) — Engravings are rare. The shape of the tip of Hi is all the way up to Ko-shinogi and fill up the whole area.

9 Hi --- groove

Nakago — Long and thin with curvature. The end of the Nakago is rounded which has the shape of chestnut’s bottom.  This is called Kurijiri. Look at the illustration of the sword above.

Hamon (tempered area pattern)— Nioi base. The tempered area is wide and the width is even, also the size of midare (irregular tempered line ) is uniform.

Boshi — Same tempered pattern continue to go up to Boshi area.  You can see Choji midare (clove-like pattern) or Yakizume.

10 Boshi --- Bizen

Bizen School Sword Smiths during Middle Kamakura Period

Fukuoka Ichimonji (福岡一文字) group ———- Norimune (則宗)   Sukemune (助宗 )Yoshioka Ichimonji (吉岡一文字) group ———-Sukeyoshi (助吉)   Sukemitsu (助光)         Sho-chu Ichimonji (正中一文字) group ———   Yoshiuji (吉氏)   Yoshimori (吉守)      Osafune (長船) group —–Mitsutada (光忠) Junkei Nagamitu (順慶長光) Kagemitsu (景光)Hatakeda hatakeda(畠田) group —————-Moriie (守家)  Sanemori  (真守)                Ugai (鵜飼) group —————————————-   Unsho (雲生) Unji (雲次)