Skip to content


Your cart is empty

About our pearls

About our pearls

All top class

The highest pearls


The pearls produced in the Uwakai account for approximately 33% of the national market share, making it one of the largest producers in Japan.

(Source: Ehime Prefectural Government “Ehime Fisheries Statistics” )


The market share of large Akoya pearls (8 mm or more) is approximately 65%, which is the top share in Japan.

(Source: Ministry of Agriculture, Forestry and Fisheries “Marine Fisheries Production Statistical Survey” )


We boast the top domestic share of mother of pearl production at approximately 66%.

(Source: Ehime Prefectural Government “Ehime Fisheries Statistics” )

The quality of Akoya Pearls

Akoya pearl quality

Many of the world's top-class pearls, both in terms of quantity and quality, are produced in the Uwa Sea, making it a sea of ​​pearls worthy of being called the Sea of ​​Abundance.

Pearls that grow in the beautiful and rich ocean are recognized by the world's top jewelers, and when it comes to ``Top of Akoya'', they are praised for being ``from the Uwa Sea''.

Make the most of the uniqueness of pearls

Akoya pearls have unique colors and shapes depending on the conditions of the shellfish and the sea. No two are the same.

Although all the pearls on this necklace look the same, they are actually all made up of only one pearl in the world.

After collecting such pearls, they are sorted by color, shape, and size, and accessories are assembled to make them look uniform.

Bring out the beauty of pearls


As shown below, all products undergo a process called processing to bring out the latent beauty of natural or cultured pearls.

Upon request, we will publish all product standards so that our customers can do business with peace of mind.

Japan Pearl Promotion Association

pearl standard criteria

1) Heating: Applying appropriate heat to pearls to remove pigments or improve luster in natural or cultured pearls.
2) Pre-treatment: Improving the luster of pearls by immersing them in water or organic solvent at room temperature or heating.
3) Bleaching: Adjustment and stabilization of color by removing organic matter (stains) contained in natural or cultured pearls (stain removal) or removing pigments (whitening).
4) Toning: Very slight improvement in the color tone of Akoya cultured pearls by adding red dye.
5) Dyeing: Modifying the color of pearls using natural or synthetic dyes.
6) Coloring: Changing the color of pearls with chemicals or other substances other than dyes.

International Precious Metals Jewelry Federation

CIBJO standards

・Coating (processing to cover the surface)
・Luster enhancement
・Tinting (slightly colored)
Irradiation (color change effect due to gamma ray irradiation)

Irradiation is a processing method found on gray pearls, in which the core of the pearl changes color to black, and the color passes through the nacre layer, giving it a gray appearance.

At our company, beautiful pearls with a thickness of 0.4 mm or more (thickness of the mother-of-pearl layer) that are at the level of "Hanadama" based on our own identification, but with slight deformation, small scratches, and medium-sized scratches are available as "Kousai Pearl" and are easy to purchase. We deal with the price.

Samples are available for loan, so if you are interested, please let us know using the inquiry form.

In addition, we do not handle pearls that are not recognized as pearls, such as coated pearls whose surface is coated with synthetic resin or special coloring agents, or arechitype (discolored) pearls that have significant discoloration. note that.

For those who want to know more about our pearls

Inquiry form

We are always accepting inquiries regarding various products (pearl products) and loaning of sample products. Please feel free to contact us by filling out the necessary information.

If this is your first inquiry, a representative from our company will call you directly, so please include your phone number and the name of the person in charge.

Our Favorites

Carefully selected collection