

-
A ring inspired by the everyday outfits of kitties.
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The design features Nekoneko's beloved herbs connecting two jewels inspired by the colors of her hair accessory. The decoration is sheer.
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You can enjoy this ring that is packed with attention to detail.
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The jewelry case is a special edition with green foil stamping on a white background.
- Jewelry used
- Jade (approx. 3mm), rhodolite garnet, sky blue topaz (approx. 1.2mm)
- material
- Silver material (SV925 & gold plating) Gold material (K18YG)
- size
- Size 7 to 25 (can be specified in 0.5 size increments)
Front width: 3.9mm, rear width: 1.1mm
Thickness: 1.2-3.9mm
- Price (incl. tax)
- Silver material: 25,800 yen Gold material: 89,800 yen




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A ring inspired by Jinshi's attire.
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The design is sharp yet elegant. The color of the costume is expressed with jewels that change color depending on the angle from which you look at them.
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You can enjoy this ring that is packed with attention to detail.
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The jewelry case is a special edition with purple foil stamping on a white background.
- Jewelry used
- Iolite (approx. 3mm),
Tanzanite (approx. 1.2 mm)
- material
- Silver material (SV925 & gold plating) Gold material (K18YG)
- size
- Size 7 to 25 (can be specified in 0.5 size increments)
Front width: 3.2mm, rear width: 1.0mm
Thickness: 1.2-3.0mm
- Price (incl. tax)
- Silver material: 25,800 yen Gold material: 89,800 yen





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We used chrysoprase with a color that was carefully selected to match the world view of the work.
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These earrings are inspired by the earrings that Nekoneko wore when she worked as a prostitute at banquets.
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A simple design that blends into everyday life.
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The jewelry case is a special edition with gold foil stamping on a white background.
- Jewelry used
- Chrysoprase (approx. 8mm)
- material
- Gold material (K18YG)
- size
- Total length: approx. 27mm (chain: 15mm)
- Price (incl. tax)
- 24,800 yen (gold material)
* Sold as one ear


By combining collaboration jewelry,
You can enjoy coordinating the outfit.
- Neko Neko Model Ring & Jinshi Model Ring
- Neko Neko Model Ring & Neko Neko Prostitute Earrings
- All collaboration jewelry items
Precautions
- All images are for illustrative purposes only.
- All sizes are approximate and may vary slightly.
- Due to the nature of natural stones, there may be differences in color from the sample. Please rest assured that we inspect each gemstone individually to ensure that the image of the piece is not affected.
Collaborative Jewelry

The collaborative jewelry features a variety of colorful gemstones, including those purchased directly from all over the world by gemologists.
The jade used in the Neko Neko model ring is gem-quality jade with a fresh transparency and a soft luster. The rhodolite garnet and sky blue topaz on the side were both chosen with an emphasis on color to reproduce Neko Neko's hair accessory.
The Jinshi model ring features iolite and tanzanite purchased in Hong Kong, a gemstone hub. Both are rich in pleochroism, and you can enjoy the way their colors change depending on the viewing angle.
For more information on polychromaticity, please click here.
KARATZ Gem Magazine "The charm of pleochroism | 8 gemstones with strong pleochroism"
The chrysoprase used in the Neko Neko Gijo earrings is a type of quartz. We carefully selected chrysoprase from Australia to recreate the color of the earrings that appear in the story.
To ensure long-lasting use, the base metal is gold-plated SILVER925 for silver materials, and K18YG (yellow gold) with a gold content of 75% or more is used for gold materials.
Enjoy the authentic jewelry that can only be delivered by the jewelry specialty store KARATZ.
Jewelry purchase benefits
- Ring purchase bonus
- For each collaboration ring purchased, we will give you one free microfiber cloth. The design will be based on the model purchased.
Size: Approx. 150mm x 150mm
- Earrings purchase bonus
- For each collaboration earring purchased, you will receive one microfiber cloth and one acrylic card featuring a scene from the series.
Microfiber cloth size: 150mm x 150mm
Acrylic card size: approx. 85mm x 54mm
Online Store
At the online store "Karatz STORE",
We will be selling collaboration jewelry by order.
- Period: 22:00 on Friday, May 23rd - 23:59 on Monday, June 30th
- Delivery time: Scheduled for late August
- Shipping: Free for orders over 8,000 yen (tax included)
Pop-up Store
At the pop-up store, you can see and touch jewelry samples. You can also try them on.
We also accept orders for jewelry, so please feel free to stop by.

- KARATZ Pop-up Store
In Shinjuku Marui Annex - Period: May 23 (Fri) - May 29 (Thu)
- Location: Shinjuku Marui Annex 2F
- Opening hours: 11:00am - 8:00pm
*Opens at 10:30 on Saturdays and Sundays *Closing at 6pm on May 29th (Thurs) only
- KARATZ Pop-up Store
In Hakata Marui - Period: June 12th (Thu) - June 15th (Sun)
- Location: Hakata Marui 3F
- Opening hours: 10am - 9pm
TV anime "The Pharmacist's Monologue"
Season 2 Introduction

Nekoneko, the daughter of a pharmacist who has an abnormal obsession with poison and medicine, and the handsome and mysterious eunuch Jinji take on further difficult cases that unfold in the palace.
"The Pharmacist's Monologue" is a hugely popular series that has sold over 40 million copies in total.
The first season, which began airing in October 2023, attracted a lot of attention immediately after it aired, and it gained a lot of sympathy not only for Nekoneko's refreshing heroine character, but also for the authentic mystery and the human drama that unfolds within the harem, making it a work that is loved by a wide range of generations, both young and old, both genders and people of all ages.
With the excitement still high, it has been decided that the second season will be broadcast in 2025!
When it becomes clear that Princess Tamaba is pregnant, dark clouds begin to swirl within the harem.
And an unprecedented unsolved case in which Jinshi's life is put in danger.
The mystery leads to more mysteries, and even more difficult cases await Nekoneko and Jinshi.
The harem mystery solving entertainment is now opening again!
What is KARATZ?

Since its establishment, KARATZ Co., Ltd. has been disseminating a wealth of information related to gems through its specialized gemstone information media, “KARATZ Gem Magazine” ( https://karatz.jp/ ), as well as through social media such as Twitter, Instagram and Facebook, with the aim of providing a place where gem appraisers can disseminate correct knowledge about gems and where anyone can feel free to ask for advice.
"KARATZ Gem Magazine" ( https://karatz.jp/ ) continues to provide a wide range of information, including not only basic knowledge about gems, but also the differences between real and fake gems, how to tell them apart, and interviews with famous people in the gem industry.
It is notable for having many readers not only from the general public but also from within the industry, with over 150,000 monthly visitors, making it one of the largest jewelry-specializing media in Japan.
In addition, the company's representative, Mr. Koyama, purchases gemstones both domestically and overseas and sells them at his own online store, "Carats STORE."
Representative Koyama visits Thailand, Sri Lanka, Hong Kong, the United States, and other countries several times a year, and sometimes even goes directly to mines to purchase gemstones.
We use our experience of buying and selling over 10,000 gemstones in total to carefully select and purchase beautiful, high-quality gemstones.
We are also popular for creating semi-custom and custom-made jewelry using a wide range of gemstones, and by teaming up with skilled craftsmen in Japan, we continue to create high-quality jewelry that you can enjoy for a long time.