RubyKaigi 2027
Overview
One of the world's largest international conferences dedicated to the Ruby language. Ruby creator Yukihiro Matsumoto (Matz), the core team, and developers from around the globe gather for deep technical talks on language internals, implementations, and performance. Following its tradition of touring Japan, the 2027 edition heads to Miyazaki.
Foundation
- Founded
- 2006
- Founder
- Ruby no Kai (Japan Ruby Association)
First held in June 2006 in Odaiba, Tokyo as "Nihon Ruby Kaigi" with about 251 attendees. As the Ruby community grew, it internationalized into a global conference drawing Ruby developers worldwide.
Transition
- 2006 First Nihon Ruby Kaigi held in Odaiba (251 attendees)
- 2013 Relaunched as RubyKaigi, adopting the English name as official
- 2018 Held in Sendai, settling in as an international conference
- 2026 Held in Hakodate
- 2027 Scheduled for Miyazaki (Medikit Kenmin Bunka Center)
Voices
Three invaluable days to catch up on the cutting edge of Ruby; with a new host city each year, it doubles as a trip
You can hear Matz's keynote live and even debate directly with the core team; the warmth of the community stands out
Student tickets are affordable and include lunch, keeping the door open for the younger generation
Open Developers Conference 2026
A developer-focused open source conference run by the OSPN community behind the Open Source Conference (OSC) series. Billed as an "open source culture festival," it packs seminars, hands-on sessions, and community booths on DevOps, dev tools, and cloud into a single free day. Modest in size at 100-plus attendees, its strength since 2018 has been direct access to the developers behind OSS projects.
DroidKaigi 2026
One of Japan's largest Android conferences, organized by engineers for engineers. Three days of technical sessions, codelabs, and networking, with many international speakers making it a globally minded technical event.
Go Conference 2026
Japan's largest community conference dedicated to the Go programming language, run by the Gophers Japan association. Sessions span language internals, concurrency, and cloud-native practice under the 2026 theme "Go Far, Go Together." With recent editions drawing 450-500 attendees, it serves as a hub for the country's Go engineers.