news

2025/02/22

【抽選販売：2/27(木) 10時am〆切】インターナリフローレスダイヤ、レッドダイヤ（トリート）、グレーダイヤ、バイカラーインペリアルトパーズなど合計9点　

2025/02/20

[Notice] Resale and price revision of "Adult Sebonstar" first edition

2025/02/08

[Yurakucho Marui 2F] Pop-up store announcement [2/21 (Fri) ~ 27 (Thu)]

2025/01/07

[Notice] Notice regarding orders and delivery during the year-end and New Year holidays

2024/12/27

[Reprint confirmed!] With the cooperation of the University of Tokyo origami club Orist, "Jewelry Origami" (published by Nihon Bungeisha) is now on sale!

2024/12/27

[Book on sale now] Published by Liberal Publishing. KARATZ "Small Jewels Book"

2024/12/18

[Yurakucho Marui 2F] Pop-up store opening announcement [December 20th (Fri) - December 26th (Thu)]

2024/12/17

[Price change notice] Notice of price change for K18 necklace chain due to rising bullion prices

2024/12/14

Announcement of "Jewelry Origami" Workshop by Orist, Origami Circle, University of Tokyo [12/22 (Sun)]

2024/08/06

[Report] CEO Koyama visited Sri Lanka and donated to 200 children.

2024/08/06

[Notice] Notice regarding orders and delivery during the Obon period

2024/06/27

[Now on sale] KARATZ's "Gemstone Encyclopedia" has been reprinted for the fifth time.

2024/05/07

[Purchase Bonus] Purchasers of Sakura Incut, Koshu Precious Stone Cut, and other products will receive a special badge💎

2024/05/01

[Notice] "Favorites List" Renewal

2024/04/30

[Notice] "Frequently Asked Questions" has been renewed

2024/04/02

[Notice] Price revision of custom-made jewelry (from mid-April 2024)