April 22, 2026

Less than 4 hours ago, the second day of RubyKaigi 2026 began one of the most important Ruby events of the year. Since last night, I’ve been incredibly excited knowing that MapView flyers can be found at one of the event’s booths.

I have great hope that this conference will bring collaborations and deeper interaction with the Ruby-LibGD and LibGD-GIS projects, taking them to the next level.

Under the hashtag #RubyKaigi, you can find photos and talk references on X and Mastodon, and witness the incredible energy this conference generates.

Soon, videos and presentations will be uploaded material that has recently served as both inspiration and the necessary push to innovate by writing gems, creating examples, and exploring the language in fields where it previously seemed not to belong.

Here’s the schedule for day two, and I hope you’ll select the talks that interest you most so we can discuss these topics when they go online.

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🗓️ RubyKaigi 2026 – Day 2 Schedule

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Here’s the complete lineup of talks happening today at one of Ruby’s most important conferences. I’ve marked my top picks with ⭐ talks I’m most excited to watch when videos go live.

09:30-10:30

📌 Twenty Years of JRuby 👤 Charles Nutter ⭐ My Pick

10:50-11:20

📌 The AST Galaxy to the Virtual Machine Blues 👤 Koichi Sasada

📌 No Types Needed, Just Callable Method Check 👤 Daichi Kamiyama

📌 Keeping Ruby Running on Cygwin 👤 Daisuke Fujimura ⭐ My Pick

11:30-12:00

📌 Building the Next-Generation Garbage Collector in Ruby 👤 Peter Zhu

📌 Uzumibi: Reinventing mruby for the Edges 👤 Uchio Kondo

📌 Programming with a DJ Controller – not vibe coding 👤 Masatoshi Seki

13:30-14:00

📌 Require Hooks: Filling the Gap in Ruby’s Extensibility 👤 Vladimir Dementyev

📌 Surviving Black Friday: 100 billion requests with Falcon! 👤 Samuel Williams, Marc-André Cournoyer, Josh Teeter ⭐ My Pick

📌 Pure Intonation on Browser: Building a Sequencer with Ruby 👤 nagachika

14:10-14:40

📌 A Faster FFI 👤 Aaron Patterson

📌 Making the RBS Parser Faster 👤 Soutaro Matsumoto

📌 Extreme MQTT on PicoRuby 👤 Ryosuke Uchida ⭐ My Pick

14:50-15:20

📌 Implementing Core Set 👤 Jeremy Evans

📌 From C to Ruby: Porting Doom 👤 Chris Hasiński ⭐ My Pick

📌 ruby.wasm also enables JavaScript to call Ruby libraries 👤 Shigeru Nakajima

16:00-16:30

📌 Thread-Coordinated Ractors: The Pattern That Delivers 👤 Maciej Mensfeld ⭐ My Pick

📌 Building a Modern Ruby <-> C++ Toolchain 👤 Charlie Savage

📌 Chasing Real-Time Observability for CRuby 👤 Shintaro Otsuka

16:40-17:10

📌 Practical TypeProf: Lessons from Analyzing Optcarrot 👤 Yusuke Endoh

📌 Whose Memory is it Anyway 👤 Jacob Denbeaux

📌 From Formal Specification to Property Based Test 👤 Masato Ohba ⭐ My Pick

17:20-17:50

📌 The future of Ruby documentation 👤 Stan Lo ⭐ My Pick

📌 Invariants in my own Ruby: some things must never change 👤 Soichiro Isshiki

📌 Integration of PRK Firmware and R2P2 👤 Hayao Kimura

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A Closing Worth Celebrating

What strikes me most about this year’s Kaigi is the incredible breadth of innovation happening within the Ruby ecosystem. From JRuby’s two decades of stability to cutting-edge WebAssembly implementations, from geospatial mapping to real-time observability Ruby continues to prove that it’s a language without boundaries.

I’m genuinely proud that MapView flyers are being shared at this conference. While we don’t have a presentation slot, having my work represented in the same space where Ruby core maintainers showcase their innovations is humbling. It represents something beautiful about our community: we lift each other up, we collaborate across domains, and we believe that Ruby can reach places many thought impossible.

RubyKaigi is genuinely something super important. It’s more than just a conference—it’s a source of inspiration, a gathering where ideas collide and spark new possibilities. Watching the incredible breadth of talks, from performance optimization to emerging domains, reminds us all of Ruby’s limitless potential and pushes us to innovate further.

As the presentations go live, I encourage you to dive deep into the talks that spark your curiosity. Pick them apart, build upon them, and don’t hesitate to share your thoughts. The conversations that happen after the conference are often where the real magic begins.

Here’s to RubyKaigi 2026 may it inspire the next wave of innovation and forge connections that push Ruby forward. 🗺️💎