Translation guide
In Japanese, the concept of a 'sharp sword' is expressed through specific nouns and adjectives that emphasize cutting ability, blade quality, or metaphorical sharpness. The most common and natural way is to use 鋭い剣 (surudoi ken) or 鋭い刀 (surudoi katana), but there are also more literary or technical terms.
Describing a sword with a keen, well-honed edge that cuts well.
The most straightforward and common way to say 'sharp sword'. 鋭い (surudoi) means 'sharp' and 剣 (ken) is a general term for sword, often double-edged.
彼は鋭い剣を腰に帯びていた。
He wore a sharp sword at his waist.
刀 (katana) specifically refers to a Japanese-style single-edged sword. This phrase is natural when talking about a katana.
Using 'sharp sword' figuratively to describe something piercing, incisive, or cutting, like words or intellect.
刃 (yaiba) means 'blade'. This phrase is often used metaphorically for something that cuts like a sharp blade, such as criticism or a sharp tongue.
彼の言葉は鋭い刃のようだ。
His words are like a sharp blade.
剣 (ken) generally refers to double-edged swords, often associated with Western or Chinese swords. 刀 (katana) refers to the traditional Japanese single-edged sword. Use 剣 for a generic sharp sword, and 刀 when specifically referring to a katana.
While 鋭い (surudoi) is the standard word for 'sharp', in some contexts other words like 切れ味が良い (kireaji ga ii, 'has good cutting quality') or よく切れる (yoku kireru, 'cuts well') are more natural for describing a sword's sharpness.
その刀はとても鋭い。
That katana is very sharp.
Literally 'famous sword', this term implies a blade of exceptional quality and sharpness, often with historical or legendary connotations.
この名刀はよく切れる。
This famous sword cuts well.
A literary or formal term for a sharp sword. Not used in everyday conversation.
利剣を振るう。
To wield a sharp sword.
切れ味 (kireaji) means 'sharpness' or 'cutting quality'. This phrase can describe both literal swords and metaphorical sharpness, like a sharp argument or wit.
彼の論理は切れ味の鋭い刀のようだ。
His logic is like a sharp sword.
A set phrase meaning 'sharp-tongued' or 'incisive in speech'. Literally 'sharp tongue-tip'.
彼女は舌鋒鋭く反論した。
She retorted with a sharp tongue.