Anime "Assassination Classroom" x KARATZ
※The special bonus postcards are no longer available.
About the Pop-up Store
Period: March 14 (Sat) - March 19 (Thu), 2026
Location: KARATZ Pop-up Store in Shinjuku Marui Annex 2F
*Starts on Saturday, March 14th.
Business Hours
Weekdays: 11:00 AM - 8:00 PM
Weekends & Holidays: 10:30 AM - 7:00 PM
*March 19 (Thu) until 5:30 PM
*Business hours on weekends, holidays, and March 19 (Thu) differ from Shinjuku Marui Annex's regular business hours.
【Items Available】
・In-person display and in-stock sales of the second collaboration jewelry collection
・In-store sales of newly drawn merchandise
*The second collaboration jewelry collection will only be available for in-store stock sales at the event venue. Sizes will be limited to 11, 12, 13, and 14. (Akabane Karma model will only be available in sizes 11 and 13.)
・In-person display and pre-order sales of the first collaboration jewelry collection
*Once in-store stock of merchandise and jewelry runs out, they will only be available through the online store.
*At the pop-up venue, you can try on jewelry, measure ring sizes, and place orders in person.
【Purchase Limits】
*For the second collaboration jewelry collection (in-stock sales), a limit of one per character per transaction applies.
【Important Notes】
*For operational safety, numbered tickets for entry may be distributed. The distribution times for entry tickets may change as appropriate.
About Online Orders
Sales Period
March 14 (Sat), 2026, 10:00 PM - May 10 (Sun)
Estimated Delivery Date for Merchandise
・Purchases made by March 31, 2026: Scheduled for late April 2026
・Purchases made by May 10, 2026: Scheduled for early June 2026
*Some products may take longer to deliver depending on production and arrival status.
*Shipping Fee: 480 yen nationwide (free for orders over 8,000 yen including tax)
Estimated Delivery Date for Jewelry:
Orders placed by the end of March 2026: Scheduled for late May 2026
Orders placed by May 10, 2026: Scheduled for late July 2026
*As these are made-to-order, delivery times may vary depending on the production status.
![[Sales end on Sunday, May 10th] Assassination Classroom x KARATZ Collaboration Karma Akabane Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu2_bnrB_1_1080x1080_f0a5caf5-70b2-4ca3-98ed-875bc439b1bd.jpg?v=1771996033&width=1080)
![[Sales end May 10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration - Kaede Kayano Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu2_bnrB_3_1080x1080_583619a3-3f89-4665-b3bd-1c85e910a491.jpg?v=1771996031&width=1080)
![[Sales End May 10th (Sunday)] Anime "Assassination Classroom" x KARATZ Collaboration Nagisa Shiota Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu2_bnrB_2_1080x1080_02146637-f489-4654-a814-1a0d4958e6de.jpg?v=1771996031&width=1080)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration - Tadaomi Karasuma Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu2_bnrB_4_1080x1080_0cd8a74b-4c0d-44b1-bdee-0854cd074e06.jpg?v=1771996031&width=1080)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration - Irina Jelavic Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu2_bnrB_5_1080x1080_43830397-3927-489b-8774-fb32721de233.jpg?v=1771996031&width=1080)
![[Sales end May 10th (Sunday)] Assassination Classroom x KARATZ collaboration Koro-sensei Five Great Gems Figure 《Limited to 100 units》](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_1_1080x1080_1be8ed3d-7a10-47a1-9508-85a22ed9b825.jpg?v=1760620266&width=1080)
![[Sales end on Sunday, May 10] Assassination Classroom x KARATZ Collaboration - Koro-sensei Model Ring](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_2_1080x1080_5a04ae14-e1e5-4855-aaff-92dce1dc2205.jpg?v=1760620220&width=1080)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Koro-sensei Model Pendant Top](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_3_1080x1080_fc821a2d-a1bd-4f69-bb76-e633fd9eb219.jpg?v=1760620244&width=1080)
![[Sales end on Sunday, May 10] Assassination Classroom x KARATZ Collaboration - Koro Sensei Model Necklace](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_4_1080x1080_0741bcdb-ae86-4e38-b0f0-0551548bb990.jpg?v=1760620220&width=1080)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Koro Sensei Model Bracelet](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_5_1080x1080_a307a391-2381-4edd-a09a-3a2caaa72c1d.jpg?v=1760620220&width=1080)
![[Sales end May 10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Koro-sensei Model Earring (Single)](http://store.karatz.jp/cdn/shop/files/ansatsu_bnrC_6_1080x1080_acf42c5b-8c28-4dd3-9221-8a31ee35ad32.jpg?v=1760620169&width=1080)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Stand (6 types in total)](http://store.karatz.jp/cdn/shop/files/ansatsu_akusuta_7.png?v=1764653453&width=1080)
![[Sales end on 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Stickers (7 designs)](http://store.karatz.jp/cdn/shop/files/ansatsu_sticker_8.png?v=1764653463&width=1080)
![[Sales end 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (1 design total)](http://store.karatz.jp/cdn/shop/files/ansatsu_akukey_1.png?v=1756101686&width=1080)
![[Sales end on 5/10 (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Acrylic Keychain (5 types, random)](http://store.karatz.jp/cdn/shop/files/ansatsu_akukey_7.png?v=1764653396&width=1080)
![[Sales End May 10th (Sun)] Anime "Assassination Classroom" x KARATZ Collaboration Can Badge (7 types, random)](http://store.karatz.jp/cdn/shop/files/ansatsu_canbadge_8.png?v=1764653424&width=1080)
![[Sales end on Sunday, May 10] Anime "Assassination Classroom" x KARATZ Collaboration Clear Card (7 types, random)](http://store.karatz.jp/cdn/shop/files/ansatsu_clearcard_8.png?v=1764653490&width=1080)
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.
So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.
KARATZ's Initiatives and Social Contributions
We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.
KARATZ Books
These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.
jeweler's tools
For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.