Builders Weekend 2026
Builders Weekend
Tokyo’s Coolest 48-Hour Hackathon
This event is a 48-hour hackathon to build cutting-edge AI products. From using Digital Garage’s and RevenueCat payment services, Lovable’s product-building environment, to VoiceOS (YC X25)’s voice AI platform, you will build a working prototype that PEOPLE ACTUALLY WANT as a team.
Date 🗓️: March 20 (Fri) – March 22 (Sun), 2026
Venue 🏟️: Shibuya PARCO Building 18F (15-1 Udagawacho, Shibuya-ku, Tokyo)
Organizer: Builders Weekend
Co-organizer / Main Sponsor: Digital Garage
Partners: Lovable, VoiceOS (YC X25), Supercell, RevenueCat
Language 📕: English (Japanese friendly)
Participation fee 💰: Free
🏆 Prizes & Benefits (planning)
Voice OS: 1 year of free credits for a team selected by
Lovable: Lovable credits (Pro Plan 1 - 100 credits, a $25 value) for product development (UI implementation with Lovable is recommended)
ElevenLabs: ElevenLabs credits ($99 worth) for product development
Additional benefits: xxx (to be updated once confirmed)
✅ Requirements
Physical participation March 20–22
Interest in developing new products or software
👜 Necessary things
Bring your own computer. We will provide light snacks and drinks for you.
📅 Schedule (small changes might happen)
March 20 (Fri)
17:00 doors open
18:00 challenges introduced
18:30 team building starts (ok to start beforehand)
19:00 food served
22:00 doors close
March 21 (Sat)
09:00 doors open, coffee served
12:00 refreshments served
18:00 dinner served
22:00 doors close
March 22 (Sun)
09:00 doors open, coffee served
12:00 refreshments served
16:00 submission deadline
16:00 judges go around tables
17:30 presentations start
19:00 winners announced
19:30 after party starts
21:45 party ends
Judges
Yoshi Ueda (RevenueCat)
Kai Brokering (VoiceOS)
Mitsumasa Kiyohara (Open Network Lab)
Jerry Chi (Supercell AI Lab)
Partners
Open Network Lab
Lovable
VoiceOS
Supercell
Revenue Cat
ElevenLabs
Privacy Policy
Please check here for venue privacy policy https://www.garage.co.jp/en/policy/
Builders Weekend Community👥
#BuildersWeekend (@BuildersWeekend)