Omi no Yari - Omi no Yari

...The handle is therefore characterized by a smooth, slippery finish, without any clumps like the spool of a spear or the hilt of a naginata.It began to be used from the end of the Kamakura period as infantry warfare developed, and by the end of the Muromachi period it had become widely used by both high and low ranks of samurai.In the Edo period it became a symbol of the status of a samurai, and it was always required for the spear bearer to carry it when going out officially.
[Spear body]
A spear consists of a body and a handle, and is called a suyari (plain spear), and usually has a straight body with two blades, and a particularly long one is called an "Oomi no yari." The tip of the body is called the "hosaki," the part that is inserted into the handle is called the "tang," and the boundary between the blade and the tang is called the "kerakubi" or "shiokubi."

*Some of the terminology explanations that refer to "Omi no Yari" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…したがって柄は，鉾の糸巻や薙刀（なぎなた）の蛭巻のように手だまりを作らずに，すべりよく，なめらかに仕上げるのを特色とし，鎌倉時代の末から歩兵戦の発達につれて使用され，室町時代の末には上下にわたって広く普及し，江戸時代には武士の格式を示す標識となり，正式の外出には必ず鑓持（やりもち）に奉持させることになった。
［鑓の身］
　鑓は身と柄からなるが素鑓（すやり）といって，両刃でまっすぐな身を用いるのが普通で，その特に長いのを〈大身（おおみ）の鑓〉という。身の先端を〈穂先〉といい，柄の内部にさし込む部分を〈茎〉とし，刃と茎との境を〈けらくび〉または〈しおくび〉という。…

※「大身の鑓」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報