Black Buffalo Horn (Square) — deep black, square form, hand-finished.
A square seal in premium black buffalo horn — dense, dignified, and unmistakably present on the page.
Why this material
- Premium black water buffalo horn, selected for tone and density.
- The square form sits firmly between the fingers — a piece you feel before you press.
- Released in limited numbers each year.
Who it’s for
For calligraphers, painters, and collectors — and for professionals who want a working seal of quiet authority.
Black Buffalo Horn (Square) — Limited
KAMAKURA SIGNET — The Masterpiece Collection
Rare, time-honoured natural materials, hand-finished to last for generations. Every seal is finished by hand in our Kamakura atelier — practising the craft since 1898, across four generations of the Tsukino family — by masters holding Japan’s First-Class National Certification, in the Tsukino Kissotai script found in no other workshop.
hand-finished to endure, and to be handed down — a personal mark made to outlast the page it is pressed upon.

















