[Sales end 11/13 (Fri)] Anime "Assassination Classroom" x KARATZ Collaboration: Nagisa Shiota Model Ring

To celebrate the 10th anniversary of the "Assassination Classroom" TV anime, the jewelry specialty store KARATZ is launching its second collaboration collection. We are introducing authentic rings that express the world of the series through gemstones.

Click here for the product list


【Collaboration Jewelry Highlights】
・We use high-quality gemstones carefully selected by expert gem buyers.
・As a jewelry specialist, we select stones based on the colors and meanings associated with each character, finishing them with delicate craftsmanship from domestic artisans.

Sales Period: Through Friday, November 13, 2026
※Sales may end or be temporarily suspended once the available stock limit is reached.

Estimated Delivery Date:
Scheduled for delivery around mid-December 2026
※Since these are made-to-order, the delivery date may shift depending on production status.


-Nagisa Shiota Model Ring-
This ring is designed in the image of Nagisa Shiota.
It incorporates soft lines inspired by Nagisa’s hairstyle, with carvings on the arm that evoke the image of a knife. The inside is engraved with "Class 3-E" to express the connection to the story.
The center stone is a Swiss blue topaz that evokes his hair color, while the side stones are blue sapphires inspired by his clear eyes.
It is a design befitting of Nagisa, reflecting both his quiet kindness and the hidden strength within.

【Product Specifications】

【Care Instructions】

・Gently wipe off sweat and dirt with a soft cloth. If necessary, wash lightly with water or lukewarm water and dry.
・When using a microfiber cloth, be careful not to use it if there is hard grit or sand attached, as this may cause scratches.
・Please avoid using abrasive cloths, silver-specific cleaners, or cleaning liquids, as these may cause the plating to peel off.

【Important Notes】

・All images are for illustrative purposes only.
・All sizes are approximate. Minor variations may occur.
・Due to the nature of natural stones, there may be slight differences in color compared to the samples. Please be assured that we inspect every single gemstone to ensure the image of the work is preserved.

■Regarding Shipping Dates
・Delivery times are estimates only.
・Dates may fluctuate due to production circumstances.


■Regarding Payment Methods
The KARATZ Store accepts the following payment methods:
Credit Card / Convenience Store Payment / Bank Transfer / Apple Pay / Google Pay / PayPay / d-Payment / Merpay / Paidy (Pay Later) / Alipay / AlipayHK / WeChat Pay

■Regarding Resizing Silver Jewelry
Silver material cannot be resized.

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©Yusei Matsui/Shueisha, Anime "Assassination Classroom" Production Committee 2025