text: 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 = ) in length.  While nagamaki means "long wrap", there have been specimens found with no 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 the 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 blade length, 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 haft and effectively function as a naginata. Araki-ryū nagamaki is a heavy naginata over  in weight and  in length.
  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 hole in the tang called a mekugi-ana.  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 pin, and nagamaki commonly have been found with two or more to account for the added leverage of a longer handle.