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Overview
I'm a hands-on engineering leader and systems builder working across machine learning, data infrastructure, and distributed systems. I currently lead ML & Data Platform for MS1 at Woven by Toyota and am based in Tokyo.
News
The Evaluation Machine
This is not the program. In classical software, engineers specify much of a system's behavior through the implementation itself, composing abstractions, contracts, invariants, and rules into the program. Learned systems change that relationship. They let
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Rocketships for the Mind
Salvador Dalí, The Persistence of Memory (1931) I wanted to share a few things that I have been working on. LLMs, chatbots, and agents have been a huge blessing for me. They let me learn as much as I want, pick up topics I find interesting, bounce ideas a
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From Payments to Claims: Where Finance Infrastructure Goes Next
Designing Capital-Intensive Applications: the big ideas behind reliable, scalable, and maintainable balance sheets. Most businesses are financed as if they were static objects. A capital provider looks at an entity, its history, its assets, maybe a person
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How to Design Metrics That Change Decisions
Why metrics? Suppose a team says: We will write good documentation. The statement describes the work the team plans to do: the implementation. The team will write, review, and publish documents. Completing that work does not tell you whether the documents
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Golden Datasets: Launch Criteria for LLM Systems
Imagine that your team runs a customer-support assistant built with a large language model, or LLM. A vendor releases a model that costs less and answers faster. You change one setting and the assistant still works. Ten trial questions produce sensible an
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