Assistant Professor · Waseda University

Structural decision
intelligence for
human–AI–market systems.

I develop validated relational methods for understanding how people, artificial agents, and markets interact, and for turning complex structural evidence into decisions that are interpretable, reproducible, and actionable.

Based inTokyo, Japan
FieldComputational social science
Core lensNetworks & complex systems
Network scienceHuman–AI collaborationDecision analyticsAgent-based simulationSustainable marketsResponsible AI

01 / Research architecture

One question, two connected programs.

How can relational evidence make complex systems more understandable, valid, and actionable?

01
Abstract multi-agent deliberation paths connecting distinct reasoning agents

Human–AI collective intelligence

When do AI agents strengthen collective reasoning, and when do they only make agreement look easier than it is?

  • Human–LLM deliberation
  • Responsible AI learning
  • Generative-agent validity
02
Complex adaptive network with connected communities and resilient rerouting paths

Sustainable markets & resilient operations

How can relational evidence reveal value formation, trust, and recovery pathways across physical and digital markets?

  • Second-hand & circular markets
  • Consumer networks
  • Robust operations
Method spineA repeatable path from complex data to defensible decisions.
01

Represent

Model actors, objects, attributes, and time as relational systems.

Network motifs · attributed graphs · NLP
02

Validate

Separate a model that fits from one that can support a claim.

Null models · holdouts · calibration
03

Design

Turn structural evidence into decisions, tools, and interventions.

Simulation · decision analytics · open pipelines

02 / Current work

Validity before strong claims.

My current projects test whether computational patterns can survive the checks needed for explanation and decision-making.

01

Collective intelligence

Measuring validity gaps between human and language-model groups

02

Responsible AI

Evaluating how case-based AI ethics education changes reasoning

03

Social simulation

Testing generative simulators against emergent network structure

04

Sustainable markets

Tracing trust, value retention, and recovery in resale systems

03 / Selected publications

Research across systems, methods, and applications.

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04 / Academic practice

Research, teaching, and open infrastructure.

My academic practice connects methodological rigor with accessible education and reusable tools. I teach data and database subjects while developing research workflows that make validation visible and reproducible.

Teaching

Building data literacy from foundations to decisions

Database systems, data analytics, AI ethics, and computational research practice.

Collaboration

Connecting structural methods to real systems

I welcome collaborations on human–AI interaction, complex networks, sustainable markets, and rigorous social simulation.

05 / Contact

Let's make complex systems
more understandable.

For research collaboration, student supervision, invited talks, or academic exchange: