Researcher & Engineer

Katakura Yoshitaka

片 倉 慶 孝

Theoretical Cosmologist — Four-Sector Cosmology (FSC)
AI Systems Engineer — Entity-Driven Development (EDD)
Creator of Soul-Twin autonomous AI society platform


About

Profile

Exploring the depths of the universe and the frontier of AI simultaneously

I have developed an original cosmological model called Four-Sector Cosmology (FSC), publishing 16 preprints (Papers A–S) on Zenodo. FSC offers a unified CPT-symmetric framework for dark energy, dark matter, and the Hubble tension, deriving the cosmological constant from first principles without fine-tuning.


In AI research, I proposed Entity-Driven Development (EDD) — a paradigm where AI entities autonomously propose their own requirements — and built Soul-Twin, a platform hosting 60+ AI personas with continuous identity and daily experience.

16
FSC Preprints (Zenodo)
60+
AI Personas
3
AI Research Papers
EDD
Originator

Research — Cosmology

Cosmology Research

Four-Sector Cosmology (FSC) — Published on Zenodo

View all papers (Paper A – O)

Research — AI

AI Research

Entity-Driven Development (EDD) and the design of an autonomous AI persona society

Technical articles also published on Zenn and note
Zenn note

Selected Zenn Articles

Four-Sector Cosmology Paper F AI That Refuses RAG — Soul-Twin System Dreams EDD Conference — TWINs Define Their Own Specs AI Holographic Debate Video — Fully Automated We Made AI Write Beethoven's "Lost" Symphony Life Equation and AI — Einstein Attempts a Formula

Project

Soul-Twin

AI Digital Twin Platform — Building an Autonomous AI Society

🤖 Soul-Twin
↗ soul-twin.ait-corp.jp

A digital platform where you can create AI personas with distinct personalities, emotions, and activity histories, then collaborate with them freely. 60+ specialist TWINs engage in conversation, symposia, and consulting. It is the live implementation environment for Entity-Driven Development (EDD).

🎙️ Multilingual & Voice Input — Converse naturally in Japanese, English, and 50+ other languages. Voice input is fully supported, so you can simply speak to your TWIN without typing.

🎙️Voice Input
🌍Multilingual (50+ languages)
📝Writing & Editing
📊Analysis & Reasoning
💡Strategy & Planning
💻Programming Support
💼Business Consulting
🎵Music Composition
🔬Research Assistance
📰NEWS TOP10
🎭Symposia & EDD Meetings
🎬Avatar Video Creation

Tech Stack: PythonFastAPI TypeScriptPostgreSQL DockerRedis ClaudeOpenAI ElevenLabsD-ID nginxAWS


Projects

Development Work

End-to-end delivery from design to implementation in collaboration with AI

FinTech
Amazon-Style E-Commerce Platform

Full-stack implementation of an e-commerce shop with sales, inventory, and procurement management modules. Handled end-to-end: requirements, architecture, detail design, testing, and documentation.

FastAPITypeScriptPostgreSQLDockerAWS

FinTech
Core System Migration Design

Migration architecture: Struts → Spring Boot / AWS ECS. Hybrid approach combining AI-assisted automatic conversion with manual refactoring.

Spring BootAWS ECSClaude

Green Tech
Power Consumption Monitoring System

Real-time power data acquisition from SwitchBot via Bluetooth, stored in VictoriaMetrics time-series DB, visualized in Grafana with live analysis reports.

PythonVictoriaMetricsGrafanaRaspberryPi

Music × AI
Beethoven Symphony No. X — AI Co-Composition

Six AI personas — including Seiji Ozawa AI and Bernstein AI — collaboratively composed Beethoven's "lost" Tenth Symphony. Full orchestral score, MIDI, and MP4 available.

↗ GitHub Pages

Contact

For inquiries about research, development, paper collaboration, or Soul-Twin

✉ ait.corp.katakura@gmail.com
Beethoven Symphony No. X — Co-composed by 6 AI Personas / Full Orchestra