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* Middle Kamakura (1232 - 1287) :
* Middle Kamakura (1232 - 1287) :
After the war happened in 1232, Hojo family held real power and Kamakura shogunate reinforced their authority. Kamakura became the center of Samurai culture and the demand of sword increased. Kamakura shogunate called in some sword smith who have superior skill from Kyoto and Okayama. They moved with family and Kamakura became the center place of the production of swords. The shapes in this period did not remain copies of the older period but changed to be more mighty.
After the war happened in 1232, Hojo family held real power and Kamakura shogunate reinforced their authority. Kamakura became the center of Samurai culture and the demand of sword increased. Kamakura shogunate called in some swordsmiths who have superior skill from Kyoto and Okayama. They moved with family and Kamakura became the center place of the production of swords. The shapes in this period did not remain copies of the older period but changed to be more mighty.
The width became to be greater, but there is no difference between the width near the Kissaki and near Nakago. Thickness also became greater. Moreover, Kissaki became to be Ikubi-Kissaki and the edge became to be Hamaguri-ba because of the edge became to be thick. Hamaguri means a clam, and we call it because the cross section of the blade looks like a clamshell. Sori is Koshi-zori and the center of Sori moved more upper and Nakago became to be a little longer then that of former period.
The width became to be greater, but there is no difference between the width near the Kissaki and near Nakago. Thickness also became greater. Moreover, Kissaki became to be Ikubi-Kissaki and the edge became to be Hamaguri-ba because of the edge became to be thick. Hamaguri means a clam, and we call it because the cross section of the blade looks like a clamshell. Sori is Koshi-zori and the center of Sori moved more upper and Nakago became to be a little longer then that of former period.
About Hamon, the brilliant patterns became to be conspicuous. Especially Fukuoka-Ichimonji school in Bizen ( Okayama prefecture ) made the so-called Obusa-Choji or Juka-Choji and they became to be popular. Obusa means the shape of the head of Hamon ( round part of Hamon ) looks like a big bunch of Choji and Juka means Choji overlapped each other. And a lot of Tanto became to be made from this period. The characteristic is Hira-zukuri and they curved toward the edge. That is, the blade curved contrary to the normal . We call this curvature Uchi-zori or Takenoko-zori. But originally the blade were straight, and the thin edge were polished again and again, then the width of the edge decreased. Therefore it looks as if it curved the reverse way.
About Hamon, the brilliant patterns became to be conspicuous. Especially Fukuoka-Ichimonji school in Bizen ( Okayama prefecture ) made the so-called Obusa-Choji or Juka-Choji and they became to be popular. Obusa means the shape of the head of Hamon ( round part of Hamon ) looks like a big bunch of Choji and Juka means Choji overlapped each other. And a lot of Tanto became to be made from this period. The characteristic is Hira-zukuri and they curved toward the edge. That is, the blade curved contrary to the normal . We call this curvature Uchi-zori or Takenoko-zori. But originally the blade were straight, and the thin edge were polished again and again, then the width of the edge decreased. Therefore it looks as if it curved the reverse way.