New official Assassination Classroom jewelry collection transforms Koro-sensei into high-end fashion
Sales are set to begin for a luxurious new jewelry collaboration celebrating the 10th anniversary of the hit anime Assassination Classroom.
The collection is produced by KARATZ, a company that operates one of Japan’s largest gemstone media platforms.
This first wave of the collaboration features a limited-edition figure and five different jewelry items modeled after the series’ iconic teacher, Koro-sensei.
The highlight of the collection is the “Koro-sensei Five Great Gemstones Figure.”
This palm-sized figure is limited to only 100 units worldwide, with each piece featuring a unique serial number.
It is set with a total of 14 real gemstones, including the “Five Great Gemstones”: Diamond, Ruby, Sapphire, Emerald, and Alexandrite.
In addition to the figure, the collection offers a range of wearable jewelry.
These items feature “Lemon Quartz” gemstones that have been delicately carved to resemble Koro-sensei’s face, capturing his signature grin.
Here is the full product lineup:
- Koro-sensei Five Great Gemstones Figure (Limited to 100)
- Price: 110,000 yen (approx. $715.00 USD / £561.00 GBP)
Features 14 gemstones including Blue Sapphire, Ruby, Emerald, Alexandrite, and multiple Diamonds.
- Koro-sensei Model Ring
- Price: 22,800 yen (approx. $148.20 USD / £116.28 GBP)
Available in sizes 7-25.
- Koro-sensei Model Pendant Top
- Price: 19,800 yen (approx. $128.70 USD / £100.98 GBP)
Does not include a chain.
- Koro-sensei Model Necklace
- Price: 22,800 yen (approx. $148.20 USD / £116.28 GBP)
Includes a 40cm chain.
- Koro-sensei Model Bracelet
- Price: 19,800 yen (approx. $128.70 USD / £100.98 GBP)
Includes a 16cm chain.
- Koro-sensei Model Pierce (Single Ear)
- Price: 12,800 yen (approx. $83.20 USD / £65.28 GBP)
Customers who purchase goods from the collection will receive a free postcard (random 1 of 7 types) for every 2,200 yen spent.
The “Assassination Classroom x KARATZ” collection is scheduled to go on sale online via the KARATZ STORE on Friday, December 5.
The sales period will run until December 25, 2025.
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