noun
ancient longsword
Historical term for a type of long sword used in ancient Japan, distinct from the later katana or tachi.
博物館で古代の長太刀が展示されていた。
An ancient longsword was on display at the museum.
Compound of 長 (naga, 'long') and 太刀 (tachi, 'long sword'), with rendaku voicing. The exact historical derivation is uncertain, but the term refers to an ancient longsword predating the classic tachi.