Japan RepRap Festival
~A World Connected by 3D Printers~
What is RepRap?
RepRap (Replicating Rapid Prototyper) is an open-source 3D printer project that originated at the University of Bath, UK in 2005. Aiming to create 'self-replicating machines,' makers worldwide have shared and improved designs. Many of today's consumer 3D printers trace their roots to RepRap.
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 WikiWhat 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
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, aimed at technology introduction and business expansion |
| Participants | Makers, individual users, educational institutions, designers, students, etc. | Corporate executives, manufacturing professionals, sales representatives, research institutions, etc. |
| Exhibition Content | DIY and modified 3D printers, artwork displays, 3D scanner experiences, workshops | Industrial 3D printers, materials, software, production solutions, etc. |
| 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 effect | Building credibility within the industry, acquiring business partners, lead generation |
| Keywords | MakerExperienceCommunityInterest | BusinessTechnology ExhibitionB2BIndustry Collaboration |
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.
History
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 Director, 3D Printer Lovers Association (incorporation in progress)
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.
Read the full interviewTeam Members
Masaki Nakamura
JRRF Operations ・ Vice Representative Director, 3D Printer Lovers Association (incorporation in progress)
A former mechanical engineer at a major Japanese corporation. Immersed in 3D printing, he turned his hobby into a business through relentless experimentation. After meeting Horiuchi, he co-founded JRRF with a vision of creating an open space where pure curiosity gathers and everyone can enjoy equally, passing on the joy of making to the next generation.
Yutaro Kimura
JRRF Operations ・ Director, 3D Printer Lovers Association (incorporation in progress)
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
JRRF Operations ・ Auditor, 3D Printer Lovers Association (incorporation in progress)
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.
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
※This event is not affiliated with the event held alongside MakerFaire in 2018 or with RRCJ.