Masahiro Kato
Biography
Hi! I am Masahiro Kato, a researcher working across econometrics, statistics, and machine learning. I am a quantitative analyst at Mizuho-DL Financial Technology, a visiting researcher at RIKEN AIP and Osaka Metropolitan University, and a PhD candidate at the University of Tokyo.
Professional Experience
RIKEN AIP, 2026-
Team for Integrated Analysis of Economic and Business Information
Visiting Researcher
Will Inc., 2026-
Representative Director
A Japanese welfare-service provider operating Type B employment support (shuro-keizoku-shien B-gata) for people with disabilities
Osaka Metropolitan University, 2025-
Graduate School of Business
Visiting Researcher
Mizuho-DL Financial Technology Co., Ltd. 2023-
Data Analytics Team
Financial Engineer
CyberAgent, Inc., AILab, 2020-2023
Ad Econ Team
Research Scientist
Education
PhD candidate in Arts and Science, 2021-
The University of Tokyo
Advised by Prof. Masaaki Imaizumi
MS in Computer Science, 2017-2020
The University of Tokyo
Advised by Prof. Junya Honda and Prof. Masashi Sugiyama
BA in Economics, 2013-2017
The University of Tokyo
Advised by Prof. Daisuke Oyama and Prof. Hidehiko Ichimura
Research
I work between econometrics, statistics, and machine learning. Most of what I do comes back to one question: how should data be collected and analyzed when the point of the exercise is to make a decision? That leads to experimental design, causal inference, and the estimation theory underneath both — and, more recently, to what it takes for a language model to produce economic analysis one can actually audit.
- AI, LLMs, and Economic Decision Making
- Adaptive Experimental Design
- Best-Arm Identification and Treatment Choice
- Debiased Machine Learning and Riesz Regression
- Causal Inference and Off-Policy Evaluation
- Density Ratio Estimation, Weak Supervision, and Anomaly Detection
- Portfolio Optimization and Financial Engineering
All projects · Notes on selected papers · Full publication list