📍 Tokyo | Engineer × Researcher × PdM | 🏢 Ex-Sony, Ex-Softbank, Ex-Dentsu | 🚀 MKHR Founder

Research and engineering in parallel: quantitative work on energy markets and infrastructure — price formation, revenue and risk modelling, backtesting on raw market data — and the data platforms and geospatial services that carry it, built end to end and running in production.

BESS (grid-scale battery energy storage) — two public studies, both reproducible end to end from raw market data: half-hourly price series, LP dispatch optimisation, backtesting, revenue attribution and error decomposition.

• jepx-revenue-anatomy — where a BESS earns its day-ahead arbitrage revenue in Japan (JEPX, FY2017–FY2025)
• bess-revenue-stack — what four common modelling shortcuts cost a BESS revenue forecast, measured one at a time on GB market data

Power grid — building a national model of Japan's transmission network: open-keitouzu, a topology dataset from the ten TSOs' statutory system diagrams, and powerjp, a pipeline joining it with power flow, area supply–demand, and spot prices.

Data centres — their environmental footprint: localised heat, land, and the grid capacity they compete for.

POI data — temporal validity: how fast a change in the real world reaches an open dataset, and what never reaches it at all.

Other work — power-market pricing, transmission rights, farmland-to-solar conversion, public-infrastructure condition, spatial accessibility, geospatial data standards.