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"Black Butler -Boarding School Arc-" x KARATZ collaboration jewelry


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We are currently preparing new merchandise and re-released jewelry from the TV anime "Black Butler -Boarding School Arc-" x KARATZ collaboration on this page.

At the event sales, you can purchase goods early. We also exhibit jewelry and take orders.

・Event sales
2025/2/21(Fri) 11:00 - 2/27(Thu) 20:00
*February 27th Thursday is scheduled to end at 6pm
Location: KARATZ Pop-up Store in Yurakucho Marui 2F
Event details here Please see.


Mail order
Jewelry: 2025/2/21 (Fri) 22:00~3/16 (Sun) 23:59
Goods: 2025/2/28 Friday 22:00~Sunday 3/16 23:59

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KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.