About CARDSTER
Connecting Japan and the World through Trading Cards
cardster.net is operated by YourJapan Inc., a Tokyo-based cross-border e-commerce company specializing in Japanese trading cards. For the past several years, YourJapan has been among the top 1–2 sellers in Japan and within the top 200 sellers worldwide on eBay (CARDSTER Tokyo), trusted by collectors in more than 80 countries.
Building on this success, we launched cardster.net on October 26, 2025 as our official D2C platform — enabling fans around the world to purchase authentic Japanese trading cards directly from Japan with confidence and transparency.
Our office and inspection center are located in Akihabara, Tokyo, where every card is carefully verified and packaged by passionate TCG experts. We are committed to delivering quality, speed, and trust, backed by global experience and Japanese precision.
Our Story
CARDSTER began with a simple idea: to connect Japan and the world through things people truly love.
Founder & CEO Ryuji Takahashi has long been fascinated by language, culture, and global trade. After living in Wisconsin, USA, and developing a deep interest in English, international business, and e-commerce, he wanted to build something that could cross borders and bring joy to people around the world.
That idea took shape through trading cards.
The journey started small — from a single room at home — selling booster boxes and collectibles such as plush toys. Over time, the focus naturally shifted toward Japanese single cards, where authenticity, condition, and trust truly matter. What began as a personal passion quickly grew into a full-scale cross-border business.
Founded in April 2021, YourJapan Inc. expanded rapidly through global marketplaces, earning the trust of collectors worldwide. In just a few years, CARDSTER became one of Japan’s top sellers and built a strong international reputation — a journey that led to the launch of cardster.net as our official direct-to-consumer platform in October 2025.
Looking ahead, we are entering a new chapter.
We are planning to open our first physical CARDSTER store in Shibuya, Tokyo, around March–April 2026. Shibuya is one of the world’s most vibrant districts and a gateway for international visitors, making it the perfect place to connect directly with collectors from Japan and abroad.
While our roots are in eBay and cross-border e-commerce, our vision is evolving — from online marketplaces, to our own platform, and now to physical retail spaces where community, trust, and experience come together. We aim to build CARDSTER not just as a store, but as a global brand born in Japan.
We warmly welcome international visitors and collectors from around the world to visit our future store. Details will be announced through our social media channels and official updates as soon as they are finalized.
From a small room to a global community — this is just the beginning of the CARDSTER story.
Company Information
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- Company Name: YourJapan Inc. (株式会社YourJapan)
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- Established: April 22, 2021
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- CEO: Ryuji Takahashi
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- Address: Kanda Araki Building 3F, 1-14-6 Kanda-Sudacho, Chiyoda-ku, Tokyo 101-0041, Japan – Google Map
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- Business License: Tokyo Metropolitan Police Second Hand Article Dealers License #303282216127
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- Capital: ¥5,000,000
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- Business Domain: Cross-border e-commerce and D2C sales of Japanese trading cards
Mission: Empowering global connections through Japanese trading cards.
Visit YourJapan Inc.
Founder & CEO
Ryuji Takahashi – Founder & CEO of YourJapan Inc.
Education
Rikkyo University, Japan, Faculty of Economics, Department of Economics
University of Wisconsin–Madison, USA, Master of Arts in English
Career
Engaged in marketing and e-commerce roles at both domestic and global companies.
Gained experience as a store supervisor, overseeing retail operations and team management.
Also worked in sales planning and international business development, contributing to strategic planning and execution from a global perspective.
Social Media
Founder (Personal)
LinkedIn | X (formerly Twitter)