Reading the Hamon — Decoding the Beauty of Japanese Swords

The hamon is one of the most beautiful features of a Japanese sword. Created during the quenching process, the boundary between the tempered edge and the body of the blade emerges as a luminous white line when it catches the light.

Suguha (straight): A straight hamon. Though seemingly simple, producing a perfectly uniform suguha requires exceptional skill. Common in the Yamashiro tradition.

Choji-midare (clove pattern): A flamboyant pattern resembling clove blossoms. The hallmark of the Bizen tradition — the choji of the Ichimonji school is called "the finest under heaven."

Gunome (semicircular): Regularly repeating semicircles. Characteristic of Mino-den; the pointed togari-gunome is typical of Kanesada and Kanemoto.

Nie and nioi: Differences in the size of particles forming the hamon. Nie are coarse, visible grains common in Soshu-den. Nioi appears as a soft, misty glow, typical of Bizen-den.

To appreciate hamon, tilt the sword under fluorescent or incandescent light and enjoy the patterns that emerge in the reflection. The way a blade's expression changes with viewing angle is one of the great pleasures of Japanese swords.