How a solo developer used Claude Code to build a national legal platform for 280 million Indonesians in one week at the Claude Code Hackathon, going from idea to 1M+ structured articles and national press coverage.
Demos and office hours run all day. Drop by for a demo between sessions. Sign up in advance for office hours. All times in Japan Standard Time (JST).
A note on language. Sessions run primarily in English with some in Japanese (marked on the agenda), and live simultaneous interpretation is available in both directions throughout the event. Office hours are held in English.
08:30 – 09:30
Check-in and breakfast
09:30 – 09:45
morning sessions
10:00 – 10:30
Building AI-native across industries with NTT, Mizuho and Mercari
·
(
Founder stage
)
·
Carlos Donderis
Mercari
Takashi Ebihara
NTT Inc
Tatsuto Fujii
Mizuho Financial Group, Inc.
What happens when domain experts can finally build
·
(
Builder stage
)
·
Jason Tangen
University of Queensland
10:00 – 10:45
10:45 – 11:15
From Claude prototype to production: How Myrealtrip builds and ships AI workflows
·
(
Founder stage
)
·
Wonjin Hur
Myrealtrip
Code for loved ones: Building customized software to bypass language barriers with my girlfriend
·
(
Builder stage
)
·
Siyuan Yan (Matt)
Kyushu University
11:00 – 11:45
11:30 – 12:00
The 1% problem: How domain expertise + Claude let a 2-person team hit #1 on a global classification benchmark
·
(
Founder stage
)
·
Gahee Seo
Federation
How to integrate Claude into your daily life
·
(
Builder stage
// presented in Japanese
)
·
Yuta Hayashi
Determinant, Inc.
12:00 – 12:45
11:45 – 13:30
Lunch
afternoon sessions
13:00 – 13:45
13:15 – 13:45
The last mile is the spec
·
(
Founder stage
// presented in Japanese
)
·
Hitoshi Tsuyuki
Tsukumo Labs Inc.
Sumiki Hori
Tsukumo Labs Inc.
Same model, three different worlds: Japan, India, Australia
·
(
Builder stage
)
·
Jason Bigman
Anthropic
Rye Smith
Spruik Co.
Sumeet Doshi
HaemoLink
Yuta Hayashi
Determinant, Inc.
14:00 – 14:30
Code less, query more with sub-agents and data
·
(
Founder stage
// presented in Japanese
)
·
Kenta Yamamoto
primeNumber Inc.
How I built a legal platform for 280 million people at the Claude Code Hackathon
·
(
Builder stage
)
·
Ilham Firdausi Putra
Pasal.id
14:00 – 14:45
Tool, skill, or subagent? Decomposing an agent that outgrew its prompt
·
(
Workshop
)
·
Karan Sampath
Anthropic
14:45 – 15:15
Manager 11: How I finally shipped my dream football management game with Claude
·
(
Founder stage
)
·
Rye Smith
Spruik Co.
15:00 – 15:45
15:30 – 16:00
Evening
15:45 – 18:00
Closing reception
Keynotes, demos, and conversations with the teams behind Claude. Recorded at Code w/ Claude 2026 Tokyo and ready to replay.