Few terms in the freshwater pearl market generate as much confusion as Kasumi ga Ura and Kasumiga. Although they sound similar, they do not refer to the same thing, and the distinction is important.

Kasumi ga Ura Pearls (Geographic Origin)

Kasumi ga Ura refers specifically to Lake Kasumi ga Ura in Japan. Pearls grown there represent a continuation of Japan’s historic freshwater pearl tradition.

Today, true Kasumi ga Ura pearls are produced by a single remaining farmer, Mr. Kiyoshi Yoneguchi. Annual production is extremely limited, measured in only a few kilograms per year. These pearls are grown slowly, often over several years, and are typically baroque in form with complex surface textures and rich natural colors.

Because of the limited production, true Kasumi ga Ura pearls are among the rarest freshwater pearls in existence. Assembling a matched strand is extraordinarily difficult and rarely possible.

Kasumiga Pearls (Trademarked Name)

Kasumiga is not a geographic designation. It is a trademarked name that may be applied to freshwater pearls regardless of origin.

In practice, most pearls sold under the name Kasumiga are Chinese bead-nucleated freshwater pearls, often produced using in-body nucleation methods. These pearls may resemble Japanese Kasumi ga Ura pearls in size, surface texture, and baroque form, but they do not originate from Lake Kasumi ga Ura.

The use of the Kasumiga name has contributed to widespread confusion in the market. While Kasumiga pearls may be well made and visually appealing, the name itself does not indicate Japanese origin.

Why the Distinction Matters

Because true Kasumi ga Ura pearls are produced in extremely limited quantities, the vast majority of similarly named pearls encountered in the market are not Japanese.

Understanding the difference between Kasumi ga Ura and Kasumiga protects buyers from incorrect assumptions about origin, rarity, and value. In professional contexts, Kasumi ga Ura should be understood as a place, while Kasumiga should be understood as a brand name.