There are various kinds of spears including Great Spear, whose ear tip (blade area) is long and Kamayari (spear with a sickle on both sides of the blade) whose root of the blade area is diverging, and Kamayari was further classified into Kata Kamayari (single-sided sickle spear) and Ryo Kamayari, which is often called Jumonji kamayari (a cross-shaped spear with a sickle on both sides of the blade), and other kinds of spears including Kudayari (tube spear), in which a mobile tube is attached to the tsuka (hilt) for easiness in sticking out, Hazuyari (a bow with a spearhead) in which a covering ear tip is applied to hazu (nock) of a Japanese bow, and Tetsukiyari (fishing spear), which has a short hilt.
穂(刃部)が長い大身槍、穂の根元が分岐している鎌槍(分岐の形状によって、片鎌槍や「十文字槍」と呼ばれる事の多い両鎌槍などに分類される)、柄に可動性の管を装着して突き出し易くした管槍、和弓の弭に被せ式の穂を装着した弭槍、柄が短い手突槍など、さまざまな種類がある。 - Wikipedia日英京都関連文書対訳コーパス
Sharp-ended stone tools resembling a knife are often categorized as point in abroad, however, in Japan they are separated from double-edged spear points and only single-edged tools are referred as stone tools resembling a knife.
海外では先端の尖ったナイフ形石器を尖頭器に含んで扱うことが多いが、日本では両刃の槍先形尖頭器とは区別して片刃の利器をナイフ形石器と呼称する。 - Wikipedia日英京都関連文書対訳コーパス