A ken (剣) is a double-edged, straight-bladed sword or dagger in traditional Japanese weaponry. Unlike the katana, which has a curved, single-edged blade, the ken is straight and symmetrical, resembling early Chinese swords. The Japanese ken is primarily a ceremonial or religious weapon, often associated with Buddhist rituals and Shinto shrines, where it symbolizes divine power and purification.

Sugata (姿, Blade Shape)

• The ken features a double-edged, straight blade.
• Unlike the katana or tachi, it lacks curvature, making it symmetrical.
• Some ken are shorter, resembling a dagger, while others can be full-length swords.