Media Network
51 living sites — daily signals for culture, entertainment, and world leaders, plus atlases, games, and research.
Company
A company connecting with the world through culture.
J-Catalyst delivers Japanese culture, media, and experiences to the world — running a live media network, producing cultural programs, and building long-term international projects.
Cultural Experiences
Nihon-buyo, calligraphy, sushi, and VIP hospitality — performed and hosted by our own people.
Global Projects
Cebu Bon Odori, Japan Expo Thailand (WANNABES sponsorship), Garin wine with Heidee Winery, and projects across 25+ countries.
Founder
Masami Oginuma
Masami Oginuma — Representative of J-Catalyst. 27 years at The Asahi Shimbun across technology, strategy, and new business; now connecting Japanese food and entertainment with the world through AI, media, and cultural production.
Profile
Company
Legal name
J-Catalyst LLC (合同会社J-Catalyst)
Former name
PREZEXUS LLC (合同会社PREZEXUS) — renamed in 2025
Representative
Masami Oginuma / 荻沼雅美
Registered address
5-3-1-1520 Kachidoki, Chuo-ku, Tokyo, Japan
Corporate number
4010003031087
Business
Culture media network, cultural programs and experiences, overseas event production, sponsorship, trade and consulting
Contact
Corporate number and registered address are as published by Japan's National Tax Agency corporate number registry.
Group
Group
J-Catalyst works as a group of focused entities, each running its own field.
J-Catalyst
Culture, media network, and experiences — this portal.
Global Stay Inc.
Real estate business. Representative: Masami Oginuma.
AIMTRADE LLC
E-commerce and export. AIMTRADE is the seller of record for physical products including the Garin wine brand; J-Catalyst handles brand planning and production.
SHIKAKU
Movie & music label.
Research
From practice to peer-reviewed research.
We don't just use generative AI — we apply it in real business, design it into education, and validate it as research.
Generative AI × Design Thinking
Co-authored research: generative-AI prototyping education for non-engineers
Peer-reviewed and accepted at TE2026 — the 33rd International Conference on Transdisciplinary Engineering (National Cheng Kung University, Taiwan) — and presented as a poster in July 2026.
Co-authors: Tsubasa Ito (Keio SDM) / Tomomi Nonaka (Waseda) / Masami Oginuma (J-Catalyst) / Seiko Shirasaka (Keio SDM, Dean)
Contact
Invite J-Catalyst to your event.
For overseas events, private cultural programs, partnership inquiries, and media collaboration.
Partnership Inquiry