# Daizen Ikehara — AI Engineer Sydney 2026

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Canonical page: https://webdirections.org/ai-engineer/speakers/daizen-ikehara/
Program status: The working timetable is public. Announced speakers and presentations are confirmed; some track assignments, session groupings and times may change as keynote, partner and specialist sessions are finalised. Morning keynote programmes and Industry sessions will be added as they are confirmed.

## Beyond System Prompts: Securing AI Agents with Fine-Grained Authorization

- Track: Industry

To make an AI agent useful, we often give it broad access to APIs and data. As systems move from simple retrieval to autonomous action, system-prompt instructions are not an adequate security boundary.

This presentation examines Fine-Grained Authorization patterns for agents: how an agent can inherit a user's permissions, how identity should flow through asynchronous and multi-agent work, and how access can be enforced at the tool and resource level.

## Daizen Ikehara

Principal Developer Advocate, Auth0

Daizen Ikehara is a Principal Developer Advocate at Auth0. He has worked across C#, JavaScript and frameworks including Angular, React and Vue, and has more than a decade of conference-speaking experience in Japan and across the Asia-Pacific region. He was an organiser of DevRelCon Japan and previously spoke at AI Engineer Melbourne 2026.

## Conference

- [Conference overview](https://webdirections.org/ai-engineer/index.md)
- [Agent guide](https://webdirections.org/ai-engineer/for-agents/)
- [llms.txt](https://webdirections.org/ai-engineer/llms.txt)