Takuya Kataiwa

🇯🇵 🇬🇧

Affiliation: 3rd‑year, Department of Information & Social Sciences, Faculty of Informatics, Shizuoka University
Born: 2004, Ishikawa, Japan

I study informatics with a focus on the mathematical understanding of language and intelligence through statistical, geometric, and information‑theoretic perspectives. My interests include symbol & language emergence, and I value translating theory into social applications.

Research Profiles / Links:
Hatena Blog · GitHub · Qiita · LinkedIn · Researchmap

Research Interests

Keywords: Embedding representations, Geometry, Mechanistic interpretability, Symbol emergence

Research Achievements

International Conference

• Enhancing LLM4Decompile with Obfuscated Source Code for Optimized Assembly
  Saito Ryota, Takuya Kataiwa, Tetsushi Ohki.
  The Network and Distributed System Security (NDSS) Symposium 2025.
  [details] [PDF] [poster]

Domestic Conference

• Measuring Intrinsic Dimension of Token Embeddings
  Takuya Kataiwa, Cho Hakaze, Ohki Tetsushi.
  The 39th Annual Conference of the Japanese Society for Artificial Intelligence (2025).
  [details]
• Simulator for Social Norm Formation by Aggregating Individual Behavioural Decisions
  Jun Tajima, Takuya Kataiwa, Kenya Sasaki, Junya Morita.
  The 39th Annual Conference of the Japanese Society for Artificial Intelligence (2025).
  [details]
• Measuring Intrinsic Dimension of Embedding Representations
  Takuya Kataiwa, Cho Hakaze, Ohki Tetsushi.
  The 31st Annual Meeting of the Association for Natural Language Processing (2025).
  [details] [PDF]
• A Method Using Dynamic Graph Neural Networks for Emotional Contagion in Local Communities
  Takuya Kataiwa, Junya Morita.
  The 21st Informatics Workshop (2023).
  [details]

Preprint

• Measuring Intrinsic Dimension of Token Embeddings
  Takuya Kataiwa, Cho Hakaze, Ohki Tetsushi.
  [arXiv]

Posters

1. Effects of Expression Types in VR Facial Expression Recognition on Authentication Accuracy and Usability
   Kazuki Nagai, Tetsuro Takahashi, Takuya Kataiwa, Masakatsu Nishigaki, Tetsushi Ohki.
   The 2026 Symposium on Cryptography and Information Security — Poster presentation.

Fellowships & Programs

• Cybozu Labs Youth (14th & 15th cohorts) — Accepted | [Official]
• Advance Lab (2nd cohort) — Accepted | [Official]
  Theme: Ensuring safety & reliability of machine‑learning model memory via geometric analysis
• UT‑Lab Membership — Accepted | [Official] [details]
• Security Camp National 2025 (Class D) — Alumni | [Official]
• Nippon Foundation HUMAI Program (Category A) — Accepted | [Official]

Awards

• Hackathon
  1. 技育博2025.vol5 (Tech Education Expo) — Sponsor Award (WingArc 1st Award) (Dec 2025 | 13.0% (3/23) | Hosted by Supporters)
  2. Open HackU 2024 Tokyo — Excellence Award (Top 6.7% – 2 of 30 teams) — Hosted by LINE Yahoo
• Ideathon — Tekuno Ai 2025 — Fighting Spirit Award (University Student Division) — Hosted by the Tekuno Ai Executive Committee (Nov 2025)
  Hamamatsu City Well-being Idea Contest (University/Graduate/Vocational Student Division) — Excellence Award (Unknown) — Hosted by LODU Inc.
  Government Reform Student Ideathon & Hackathon — Technology Utilization Award (Top 11.1% – 1 of 9) — Hosted by the Cabinet Secretariat
  Shizuoka University Ideathon & Datathon 2025 — Grand Prize (Top 16.7% – 1 of 6)
  Challenge Open Governance (COG 2024) — Semi‑Finalist (Top 22.7% – 25 of 110)

Competitive Experience

• Competitive Programming: AtCoder — Green
  Mathematics Competition: Online Math Contest — Aqua
  CTF (Capture The Flag):
  Full Weak Engineer CTF 2025 [Top 4.9% - 36 of 773]
  SECCON for beginners CTF (Top 6.4 % - 57 of 880)
  DIVERS OSINT 2025 (Top 2.5% - 16 of 668)
  CRATE CTF 2024 (Top 5.7% – 13 of 227)
  DIVERS OSINT 2024 (Top 5.7% – 26 of 453)
• iGEM HG‑Tokyo — Advisor (2025‑04 – Present)
  Gold Medal • Presentation — Top 6.8% (10 of 146) • Village — Top 10.9% (5 of 46) • Best Integrated Human Practices
  [Twitter]

Management Experience

• ANCHOR — Agora for Neuroscience, Consciousness, Human, Organisms & Related Research (2024‑10 – Present)
  Reading group on computational & cognitive neuroscience. [Official] [Discord]
• CPC Spring Camp 2025 — Executive Committee (2024‑12 – 2025‑03) [Official]
• CPC Student Workshop 2025 — Vice Chairman (2024‑12 – 2025‑03) [Official]
• Symbol Emergence Outreach Team — Committee Member (2025‑5 – 2025-9) [Official] [Twitter] [YouTube] [Note]
• IYNA Japan Chapter — Advisor (2024‑12 – Present) [Official] [Twitter] [Instagram] [Note]

Projects

• Mainly hackathon or coursework projects:
• IYNA Japan Website — July 2025 [repo] [link]
• CPC‑web — Mar 2025 [repo] [link]
• Bansho — Jan 2025 (Course assignment) [repo] [link]
• SpeakUp — HackU Kanazawa 2024 [repo] [video]
• Difflog — HackU Tokyo Vol.2 2024 [repo] [video]
• Hoikuru‑zu — HackU Tokyo Vol.1 2024 [repo] [video]

Other

• Selected Quotations (Japanese)

I enjoy deep conversations, great food, and travelling. Learning something new and widening my worldview is my greatest motivation.