[Sales end on Sunday, May 10] Assassination Classroom x KARATZ Collaboration - Koro-sensei Model Ring

The TV anime "Assassination Classroom" has collaborated with the jewelry specialty store KARATZ to create authentic jewelry using precious stones.

Special page here


[Collaboration Jewelry Attention to Detail]
- We use high quality gemstones carefully selected by experienced gem buyers.
- SV925 is gold plated to keep it in beautiful condition for a long time.
- Each item is carefully crafted by skilled craftsmen in Japan.

Sales period: March 14th (Sat) 2026 at 10pm - May 10th (Sun)
*Sales may end or be temporarily suspended once the available number is reached.

Estimated delivery date:
Orders placed by the end of March 2026: Expected delivery date: around the end of May 2026
Orders placed by May 10, 2026: Expected delivery date is the end of July 2026. *As this is made-to-order, delivery may vary depending on production status.


-Korosensei Modeling-
This charming Korosensei model ring features a transparent lemon quartz gemstone with intricate carvings resembling Korosensei's face.

[Product Specifications]

[Care instructions]
- Gently wipe off sweat and dirt with a soft cloth, and if necessary, lightly wash with water or lukewarm water and dry.
・When using a microfiber cloth, please be careful not to use it with hard dirt or sand attached, as it may cause scratches.
- Avoid using cloths containing abrasives or silver-specific cleaners/cleaning solutions as they may cause the plating to peel off.

[Notes]
・All images are for illustrative purposes only.
*All sizes are approximate and may vary slightly.
・Due to the characteristics 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.

■Regarding the estimated shipping date: Delivery times are only estimates.
-Delivery dates may be delayed due to manufacturing reasons.

■About payment methods The following payment methods are available at Caratz STORE.
Credit card / Convenience store payment / Bank transfer / Apple Pay / Google Pay / PayPay / d-payment / Merpay / Deferred payment (Paidy) / Alipay / AlipayHK / WeChat Pay

■Regarding resizing of silver material: Silver material cannot be resized.

karatz_ID:ansatsu_40000326

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