Builders Weekend 2026

Hosted by Builders Weekend & 9 others

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Shibuya, Japan

Past Event

Welcome! To join the event, please register below.

About Event

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