noun
swordsmanship; skill with a sword
Refers to the technique or skill of wielding a sword, often in a martial context. Compare with 太刀筋, which can have a similar meaning.
See also: 太刀筋
彼の剣筋は見事で、誰も敵わなかった。
His swordsmanship was superb, and no one could match him.
noun
line of a sword cut; slash line
Describes the visible line or trajectory left by a sword tip when cutting through the air or an object. Often used in descriptions of sword techniques or in historical/fantasy contexts.
刀が空を切ると、鋭い剣筋が光った。
As the sword cut through the air, a sharp slash line gleamed.