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We make quiet hours of thinking
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Made in Seoul
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Hello Japan!

We’re a Seoul-based startup, designing and making TheSudoku.

Thanks!

Since this summer, I’ve been getting so many DMs from friends in the Japan asking if they can get The Sudoku.

Thank you so, so much for showing love to our reimagined version of Sudoku — made with our own little vibe 🩵

So, we go Japan!

So, we’re going to Japan!

Can’t wait to see you soon 💛

Items

TheSudoku
¥5,300

TheNonogram
¥5,900

FAQ
💸 What is the return policy?

Yes, absolutely! If you receive the product and don’t like it, or if it’s not quite what you expected, we offer a 100% full refund.

Just email us at contact@dcrtco.com — we’ll guide you through the return process step by step 💌
🧩 Can kids play too?

Yes! Our puzzles are designed for both adults and children to enjoy together.

For example, level 1 puzzles are easy enough for 2nd or 3rd graders — once they learn how to play, they can solve them on their own! ✨
📦 When will I get my order?

You can expect to receive your package within about 2–5 days after it’s shipped!

Delivery times vary depending on your location.
🏭 Where are your products manufactured?

The Sudoku is designed and made in Korea. 🇰🇷✨

We hope to bring you a product that combines quality and value — every detail is crafted with care.

Story

How The Sudoku Was Born

Episode 1 — A Thousand Small Decisions: The Quiet Journey to Making The Sudoku

Team Diary
All team picnic at Seonjeongneung, Seoul

All team picnic at Seonjeongneung, Seoul
Work from home day

Work from home day on Zoom
Team HBD at party room, Gangnam, Seoul

Team HBD at party room, Gangnam, Seoul
Twon-Hall meeting

Twonhall meeting at Conf. room, Seongsu-dong, Seoulforest, Seoul
All team picnic at Han-River Park

All team picnic at Jamwon Han-River Park
Popup Store at Jeju

Popup Store at Jeju
Popup Store

Popup Store at IparkMall Dopamination, Youngsan-gu, Seoul