Japan RepRap Festival
~A World Connected by 3D Printers~
What is Japan RepRap Festival?
Japan RepRap Festival (JRRF) carries on the spirit of RepRap as an annual celebration where Japan's 3D printing community comes together. From DIY machines to the latest commercial printers, it's an interactive event where you can see, touch, and experience real machines.
A Bridge of Knowledge and Culture
The roots of modern desktop 3D printers lie in self-built 3D printers (RepRap). JRRF serves as a bridge of knowledge and culture connecting everyone—those who discovered 3D printing through DIY machines, those who started with ready-made printers, and those who don't yet own a 3D printer but are curious about the technology.
Real Machines
See and touch real working 3D printers, from DIY to latest models
Community
Makers, companies, and beginners gather to exchange information
Experience & Sales
3D scanner experience and printed works sales also available
What is RepRap?
RepRap (Replicating Rapid Prototyper) is an open-source 3D printer project started in 2005 by Dr. Adrian Bowyer at the University of Bath, UK. Built on the revolutionary concept of a machine that can print its own parts and self-replicate, all designs were released as open source, allowing makers worldwide to freely create, modify, and share. Since the birth of the first RepRap machine 'Darwin,' the technology and philosophy that emerged from this project have become the foundation of today's consumer desktop 3D printer industry. Major manufacturers including Prusa, Bambu Lab, and Creality all trace their roots back to RepRap.
Dr. Adrian Bowyer and the Birth of RepRap
Dr. Adrian Bowyer is a Senior Lecturer in mechanical engineering at the University of Bath, UK, and the founder of the RepRap project. In 2005, he proposed the idea of a 3D printer that could print its own parts, and in 2007 completed the first RepRap machine 'Darwin.' By releasing the designs as open source, he enabled makers worldwide to freely build 3D printers, laying the foundation for today's desktop 3D printer industry. He was awarded an MBE (Member of the Order of the British Empire) for his contributions.
Open Source Spirit
RepRap designs are open source, allowing anyone to freely create, modify, and share. This spirit is at the heart of JRRF.
RepRap Official WikiHistory
The 1st JRRF was held in June 2025 at Tokyo Ryutsu Center Hall C, welcoming over 1,500 visitors and 77 booths, ending in great success.
In 2026, we're expanding to Hall E (approximately double the space) for an even bigger 2nd event.
Meet the Organizer
Yuto Horiuchi
堀内 雄登
JRRF Founder ・ Representative
A 29-year-old office worker at a foreign manufacturing company who describes 3D printing as his "hobby." Yet the scale of this hobby is extraordinary—he operates over 20 3D printers at home. He organized JRRF 2025 as an individual with just three months of preparation, drawing over 1,500 visitors.
Vice Organizer
Masaki Nakamura
中村 政輝
JRRF Operations ・ Vice Representative
After gaining experience as a mechanical engineer at a manufacturer, he went independent. He runs a 3D printer e-commerce business, handling everything from individual sales to corporate deployment support. A hands-on practitioner with over 20 3D printers running at home. As co-founder of JRRF, he oversees planning, operations, sponsor relations, and booth design. He values creating a flat, inclusive making space where companies and individuals, beginners and veterans alike, can all enjoy equally.
Team Members
Yutaro Kimura
木村 優太郎
JRRF Operations
A software engineer at an IT company and freelance robotics engineer, currently pursuing a doctoral degree. Started using 3D printers around 2017 to recreate weapons from anime, now primarily uses them for robot development. Loves 'cute moving machines' whether they're 3D printers or robots.
Daisuke Sato
佐藤 大亮
JRRF Operations
A robotics software engineer by profession. Started using 3D printers to make robot parts, now also involved in community management. Continues OSS maintenance and community activities in the robotics field as well. Interested in broadening the base of making as someone who supports the 'creation' side.
Operations Support
Voices from Participants
People got to touch what I made, share their thoughts, and compliment my ideas. They kept saying the Makerchip and keychains were so cute—it was an absolute blast!!
JRRF 2025 Exhibitor
Despite the name Japan RepRap, this is an event where you can discover the ‘now’ of unique and diverse efforts by companies and enthusiasts from around the world. What exciting things will you find next time? We’ve got something fun lined up again this year!🐰🔥
JRRF 2025 Exhibitor
I attended JRRF2025 alone. I was a bit nervous, but I was so happy to meet people whose posts I always enjoy on X. It was fun seeing 3D printed creations, but I was overwhelmed by how many people build their own 3D printers—the technical skill was amazing. Even though I couldn’t fully understand the explanations, that was also a fun experience. There were lots of novelty items, many that kids would love. It’s not just a hobby event for dads—moms and small children can enjoy it too!
JRRF 2025 Visitor
JRRF2025 was a vibrant event where all kinds of equipment and information came together! It was a wonderful gathering that everyone could enjoy regardless of age or background—whether corporate, individual, or just curious visitors. I'm really looking forward to JRRF2026!
JRRF 2025 Visitor
Congrats on JRRF 2026 being confirmed! Last year I had everything planned but couldn’t make it at the last minute—I could only entrust my Makerchip, a coin carrying my maker spirit. This year I’ve already booked the hotel and flights, so come shake my hand at JRRF 2026!
JRRF 2026 Attendee
Come to JRRF and you'll understand 3D printers!!! The latest 3D printers, independently developed machines, practical applications—if you have even a little interest in 3D printing, you can't afford to miss it!!!
JRRF 2025 Exhibitor / 2026 Exhibitor
I got to talk face-to-face with makers you normally never see in person. Knowing some English helps if you want to dig deeper—though I don't speak any! The atmosphere alone made it a blast, with all sorts of weird and wonderful machines everywhere. I absolutely have to go again next time!
JRRF 2025 Visitor
Even without any 3D printer friends around me, going to JRRF2025 expanded my world and I made so many new connections. Experiencing the ever-evolving 'present' and 'future' of technology got me moving again after feeling stuck. I can't wait for JRRF2026!
JRRF 2025 Visitor
I felt that JRRF 2025 was a wonderful event that further propels 3D printing technology at a turning point. 3D printing has eliminated the high barrier of manufacturing that once stood between thought and reality at the individual level, fostering the maker spirit worldwide. In that context, JRRF stands as a milestone in Japan, with an incredibly wide range of participant ages, broadening the community's reach. I truly hope people will come and feel that energy in person.
JRRF 2025 Visitor
I went to JRRF2025 and got to try out 3D scanners I'd been curious about, and could consult about whether my ideas were feasible. It's a great chance to see products in person if you're interested, and the friend I brought along got interested too!
JRRF 2025 Visitor
Voices from Sponsors
Exhibiting at JRRF provided an invaluable opportunity for direct dialogue with users, leading not only to connections with individual customers but also to successful implementations for companies considering 3D printers.
Sunstella
Sunstella
JRRF was a fantastic event where we could directly feel the passion of the Japanese 3D printing community. The scale of the venue and the atmosphere of the booths were comfortable, and it was a wonderful event where you could feel the warmth of the community. We would love to participate again.
Prusa Research
Prusa Research
Everything about consumer 3D printers was here. JRRF is a one-of-a-kind event where people, products, and information related to 3D printing gather from both Japan and abroad.
APPLE TREE
APPLE TREE
JRRF had incredibly enthusiastic participants, and it provided a valuable networking opportunity with peers in the industry.
SK honpo
SK honpo
It was a wonderful event where I could feel the excitement of the 3D printer industry with my whole body! The enthusiasm of the community exceeded my imagination.
Asahi Kasei
Asahi Kasei
Being able to interact directly with Japanese users at JRRF and receive feedback on our products was extremely valuable. We were moved by the enthusiasm of the community.
EIBOS
EIBOS
JRRF was a valuable venue for direct dialogue with resin and filament users. We gained deep understanding of the Japanese market needs.
Siraya Tech
Siraya Tech
At JRRF, we truly experienced the greatness of the Japanese maker community. We were amazed by the high technical level and passion of the participants.
BIQU
BIQU
How JRRF Differs from Trade Shows
JRRF is fundamentally different from typical B2B trade shows. Unlike exhibitions focused on industry business deals, JRRF puts makers and community at the center.
| Comparison | JRRF | Industry Trade Shows |
|---|---|---|
| Nature & Purpose | Community and maker-driven event, emphasizing the joy of 3D printing and exchange | B2B commercial exhibitions organized by industry associations and companies |
| Participants | Makers, individual users, educational institutions, designers, students | Corporate executives, manufacturing professionals, sales representatives |
| Atmosphere | Casual and free, experience and exchange-focused | Formal with strong business focus |
| Benefits for Companies | Building brand affinity, direct interaction with end users, SNS amplification | Building credibility, acquiring business partners, lead generation |
JRRF is a "Maker Festival." Both exhibitors and visitors are connected by their shared love of 3D printing. It's not a business venue—it's a place to share what you love and enjoy new encounters.
※This event is not affiliated with the event held alongside MakerFaire in 2018 or with RRCJ.