Code with Claude Tokyo: Extended — June 11, 2026

11 June 2026

Tokyo

To meet demand, a second event just for independent developers and early-stage founders: founder stories, builder deep-dives, and laptops-open workshops from our Applied AI team. Code with Claude is where you hear what's new. Extended is where you see it in the wild.

Attend virtually

Founder stage

When anyone can build, the founder's edge is knowing what to build and sticking with it. Sit in with founders and technical leaders from startups built on Claude as they walk through the bets they made, the road from prototype to first revenue, and the judgement calls they’ve made.

Builder stage

You don't need a CS degree or an engineering team to ship real software anymore. You need a problem you understand and the will to solve it. We’ll see working demos, real code, the techniques behind each.

Workshops

Join the same hands-on sessions Anthropic uses to train its own technical staff, adapted for you. Ship your first managed agent, give it memory, write evals that move the score, compose multi-agent systems, then put it all to the test in a live agent battle.

Agenda

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
Community general session
·
(Founder stage)
Founder stage
·
Boris Cherny
Anthropic
morning sessions
10:00 – 10:30
What happens when domain experts can finally build
·
(
Builder stage
)
Builder stage
·
Jason Tangen
University of Queensland
Building AI-native across industries with NTT, Mizuho and Mercari
·
(
Founder stage
)
Founder stage
·
Carlos Donderis
Mercari
Takashi Ebihara
NTT Inc
Tatsuto Fujii
Mizuho Financial Group, Inc.
10:00 – 10:45
How we Claude Code
·
(
Workshop
)
Workshop
·
Jason Schwartz
Anthropic
10:45 – 11:15
From Claude prototype to production: How Myrealtrip builds and ships AI workflows
·
(
Founder stage
)
Founder stage
·
Wonjin Hur
Myrealtrip
Code for loved ones: Building customized software to bypass language barriers with my girlfriend
·
(
Builder stage
)
Builder stage
·
Siyuan Yan (Matt)
Kyushu University
11:00 – 11:45
Ship your first Managed Agent
·
(
Workshop
)
Workshop
·
Koki Yoshida
Anthropic
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
)
Founder stage
·
Gahee Seo
Federation
How to integrate Claude into your daily life
·
(
Builder stage
 // presented in Japanese
)
Builder stage
·
Yuta Hayashi
Determinant, Inc.
12:00 – 12:45
Agents that remember
·
(
Workshop
)
Workshop
·
Sam Jiang
Anthropic
11:45 – 13:30
Lunch
afternoon sessions
13:00 – 13:45
Evals for taste: Hill-climbing a slide-generation agent
·
(
Workshop
)
Workshop
·
Jonah Dueck
Anthropic
13:15 – 13:45
The last mile is the spec
·
(In Japanese)
(
Founder stage
 // presented in Japanese
)
Founder stage
·
Hitoshi Tsuyuki
Tsukumo Labs Inc.
Sumiki Hori
Tsukumo Labs Inc.
Same model, three different worlds: Japan, India, Australia
·
(
Builder stage
)
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
·
(In Japanese)
(
Founder stage
 // presented in Japanese
)
Founder stage
·
Kenta Yamamoto
primeNumber Inc.
How I built a legal platform for 280 million people at the Claude Code Hackathon
·
(
Builder stage
)
Builder stage
·
Ilham Firdausi Putra
Pasal.id
14:00 – 14:45
Tool, skill, or subagent? Decomposing an agent that outgrew its prompt
·
(
Workshop
)
Workshop
·
Karan Sampath
Anthropic
14:45 – 15:15
Manager 11: How I finally shipped my dream football management game with Claude
·
(
Founder stage
)
Founder stage
·
Rye Smith
Spruik Co.
How I shipped a life-saving app with Claude Code
·
(
Builder stage
)
Builder stage
·
Sumeet Doshi
HaemoLink
15:00 – 15:45
Agent Battle: Mine the most diamonds in 45 minutes
·
(
Workshop
)
Workshop
·
Liam Plambeck
Anthropic
15:30 – 16:00
Rewriting Bun in Rust
·
(
Founder stage
)
Founder stage
·
Jarred Sumner
Anthropic
Evening
15:45 – 18:00
Closing reception

Featured speakers

Featured speakers

Boris Cherny headshot

Boris Cherny

x.com
LinkedIn

Head of Claude Code

Anthropic

Angela Jiang headshot

Angela Jiang

x.com
LinkedIn

Head of Product

Claude Platform, Anthropic

Katelyn Lesse headshot

Katelyn Lesse

x.com
LinkedIn

Head of Engineering

Claude Platform, Anthropic

Cat Wu headshot

Cat Wu

x.com
LinkedIn

Head of Product

Claude Code, Anthropic

10 June

Code w/ Claude

Anthropic's developer conference. Live demos of new capabilities, hands-on workshops, and conversations with the research and product teams building Claude — where we share what's shipping and what's next.

Learn more

FAQ

Demand to attend Code with Claude in-person far exceeded our expectations. To be able to give more people access to the event experience, we added a second day just for independent developers and early-stage founders.

Code with Claude is designed for software developers, engineers, and technical leaders who are building with AI. Whether you're just getting started with Claude or are an experienced builder, you'll find sessions tailored to your level.

Space is limited. Given the demand for in-person attendance at Code with Claude, invites to Code with Claude: Extended were made to existing applicants.

Code with Claude: Extended will not be livestreamed. Sessions will be recorded and made publicly available after the event.

No, in-person attendance is free.

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