Late Kamakura
Tachi at the end of the Kamakura period have developed into magnificent Sword. There are two types: one is wide throughout its length and the point section is the same as mid- Kamakura period kissaki, but slightly extended. The other is quite slender and similar in appearance to the late Heian, early Kamakura shapes. However, when you look further along the blade the shape has changed; the curvature has moved further along the blade. During this period notare-gunome hamon appeared. It is said that in Sagami province Goro Nyudo Masamune perfected the production of nie-deki blades.