It is possible that nagamaki were first produced during the Heian period (794 to 1185) but there are no known examples dating from before the mid Kamakura period (1192–1333). During the middle of the Muromachi period (1336–1573 A.D.) the nagamaki reached its peak of usage.
The nagamaki was a long sword with a blade that could be 2 feet or more and a handle that about equal length to the blade. The blade was single-edged and it could resemble a naginata blade, but the main difference in how the blades were mounted was that the handle (tsuka) of the nagamaki was not a simple wooden shaft as in the naginata; it was made more like a katana hilt. Even the name "nagamaki" ("long wrapping") is given by the tradition of handle wrapping. The nagamaki's handle was wrapped with leather or silk cords in criss-crossed manner, very similar the that of a katana's. The nagamaki is considered to be evolved from the extremely long nodachi or ōdachi swords that are described in fourteenth century literature and pictorial sources.
The length of blade varies on a nagamaki. However, the nagasa (blade length) most commonly fits the profile of a tachi or katana blade, which would be a blade of more than 2 shaku (2 Shaku = 60.6 cm, roughly 2 feet) in length. While nagamaki means "long wrap" they have been found with no ito (wrapping cord) at all, which is very much like a long tachi handle. The tsukamaki (hilt wrap) is of even more importance when applied to the hilt. The cord helps to improve grip on the hilt and also lends structural integrity to the wooden handle. Nagamaki found without hilt wraps usually had at least metal collars around the hilt where the tang is.
There are no solid rules governing the aspects of the make of the nagamaki. Unlike wakizashi, tantō, and katana, which have had history of strict measurements regarding the blade length and even the hilt in some cases; the nagamaki varied in nagasa, tang length, kissaki style, etc. Nagamaki presumably could have koshirae in a tachi or katana style as well as a nagamaki style, however there are examples of nagamaki with rather long tangs, which could be fitted with a longer staff for a haft and effectively function as a naginata. Araki-ryū nagamaki is a heavy naginata over eight pounds of weight and eight feet long.
All traditional Japanese swords are fitted very snugly to their hilts and held in place with a mekugi, a bamboo peg which is fit through a mekugi-ana (hole in the tang and hilt). This is actually quite a strong mount when done correctly, and allowed for easy dismount of the bare blade for maintenance or inspection. Katana most commonly had one single mekugi, and nagamaki commonly have been found with two or more to account for the added leverage of a longer handle.
Wielding is very specific; it is held with two hands in a fixed position in the same way a katana is held. Unlike the naginata, the hands do not change when handling the weapon and the right hand was always the closest to the blade. While handling nagamaki fewer sliding actions on the handle are performed than are with the naginata, where the entire length of the shaft is used. The nagamaki is designed for large sweeping and slicing strokes. Traditionally the nagamaki was used as an infantry weapon, frequently used against cavalry.
- Sir Alonne, a boss encountered in the Dark Souls 2 DLC campaign Crown of the Iron King, is a samurai-esque character who wields a nagamaki. He will commit seppuku with the nagamaki should the player defeat him without taking damage or using healing items.
- Lyon, a supporting character in the fifth Suikoden game, wields a nagamaki to protect her charge, the Prince of Falena, who is the main protagonist.
- In the The Lord of the Rings films The Fellowship of the Ring and The Two Towers, the High Elves are shown using a curved, single-edged sword very similar to the nagamaki, except for a subtle S-shape.
- The Development of Controversies: From the Early Modern Period to Online Discussion Forums, Volume 91 of Linguistic Insights. Studies in Language and Communication, Author Manouchehr Moshtagh Khorasani, Publisher Peter Lang, 2008, ISBN 3-03911-711-4, ISBN 978-3-03911-711-6 P.150
- The Complete Idiot's Guide to World Mythology, Complete Idiot's Guides, Authors Evans Lansing Smith, Nathan Robert Brown, Publisher Penguin, 2008, ISBN 1-59257-764-4, ISBN 978-1-59257-764-4 P.144
- Friday 2004, p. 88.
- The Connoisseur's Book of Japanese Swords, Author Kōkan Nagayama, Publisher Kodansha International, 1997, ISBN 4-7700-2071-6, ISBN 978-4-7700-2071-0 P.23
- Amdur 2002, p. 117.
- Friday 2004, p. 88.
- Friday 2004, p. 88.
- Amdur 2002, p. 121.
- Amdur 2002, p. 120.
- Amdur, Ellis (2002). Old School, Essays on Japanese Martial Traditions, Edgework
- Friday, Karl F. (2004). Samurai, Warfare and the State in Early Medieval Japan, Routledge ISBN 0-415-32962-0
- Knutsen, Roald M. (1963). Japanese Polearms, The Holland Press, London
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- Nihonto message board forum
- Richard Stein Article on the Nagamaki
- Swordforum Article on the Nagamaki
- Swordforum Discussion of the Nagamaki