Research Interests

Machine Learning, Information Geometry, Tensor Networks, Energy-based Model

Memberships

Apr. 2020 – now JSAI (The Japanese Society for Artificial Intelligence)
Mar. 2017 – Mar. 2018 JPS (The Physical Society of Japan)

Affiliation

Section for Cognitive Systems
Department of Applied Mathematics and Computer Science
Technical University of Denmark

Contact

Biosketch

External Stay

Periods of leave

Paternity leave: 7 Oct. 2024 – 7 Nov. 2024 (4 weeks)

Academic degree

🎓 Doctor of Philosophy in informatics, The Graduate University for Advanced Studies, 24 Mar. 2023
Thesis: Convex Manifold Approximation for Tensors
Committee: Prof. Mahito Sugiyama (chair), Prof. Yuichi Yoshida, Prof. Katsumi Inoue, Prof. Kazushi Mimura, Prof. Makoto Yamada

Thesis

• Convex Manifold Approximation for Tensors [pdf] [Slide]
  Doctoral thesis, The Graduate University for Advanced Studies (24 Mar. 2023)
• Valley polarization in layer material by light absorption [pdf] [Abst] [Slide]
  Master thesis, Graduate School of Science and Faculty of Science (2018.3)
• 傾いたディラックコーンにおける磁場中のエネルギー準位構造 [Abst] [Slide]
  Bachelor thesis presentation, School of Science, Gakushuin University (Mar. 2016)

💵 Grants and fellowships (PI)

1. Feb. 2025 – Feb. 2027 Danish Data Science Academy, Postdoc Fellowship 2024
   NTN-C3: Nonnegative Tensor Networks — Identifying the Limits of Convexity, Gains of Complexity, and Merits of Certainty
   1,260,000 DKK (incl. Salary)
   
2. Jul. 2024 – Mar. 2025 National Institute of Informatics Open Collaborative Research 2024
   Unified solver for non-negative tensor factorization
   650,000 JPY
   * Originally served as PI; position transferred after moving to an institution abroad.（海外研究機関への移籍に伴い、研究代表者を交代）
   
3. Jun. 2023 – Mar. 2024 AIP Challenge Program
   Quantum Multi-Body Modeling of Non-Negative Tensors
   1,000,000 JPY
   
4. Apr. 2023 – Mar. 2026 RIKEN, Special Postdoctoral Researchers Program
   Graph Low-rank Decomposition
   Host researcher: Prof. Yoshinobu Kawahara, Osaka Univ.
   3,000,000 JPY + Salary
   
5. Sep. 2021 – Mar. 2021 日本学術振興会 第2回 若手研究者海外挑戦プログラム
   情報幾何学に基づくテンソル多体相互作用解析とバイオインフォマティクスへの応用 (declined)
   Host researcher: Prof. Karsten BORGWARDT, ETH Zürich
   
6. Oct. 2021 – Apr. 2022 Young Researchers’ Exchange Programme between Japan and Switzerland 2021
   Tensor based many-body interaction analysis by information geometry and its applications to bioinformatics
   Host researcher: Prof. Karsten BORGWARDT, ETH Zürich
   Travel fee + financial support (15000 CHF) [Report]
   
7. Apr. 2020 – Mar. 2023 Research Fellowship for Young Scientists (DC1)
   An information-geometric approach to quantum statistical physics using log-linear models on posets
   Host researcher: Prof. Mahito Sugiyama, SOKENDAI
   3,100,000 JPY + Salary [Report]
   

👑 Awards

• 📝 Top Reviewer of NeurIPS 2025, 20 Nov. 2025 🔗
• 👑 AIP Network Laboratory Director Award, 4 Mar. 2024🔗
  AIPチャレンジプログラム AIPネットワークラボ長賞
• 📝 Top Reviewer of NeurIPS 2023 (10.2%, 1,197 of 11,725 reviewers), 20 Nov. 2023 🔗
• 👑 JSAI Annual Conference Award 2023, 1 Nov. 2023 🔗
  人工知能学会全国大会（第37回）優秀賞
• 🎓 School of Multidisciplinary Science Dean’s Award, 24 Mar. 2023
  総合研究大学院大学 複合科学研究科長賞
• 👑 Best Student Award, National Institute of Informatics, 22 Sep. 2022
  国立情報学研究所優秀学生賞
• 👑 JSAI Annual Conference Award 2021, 1 Nov. 2021 🔗
  人工知能学会全国大会（第35回）優秀賞
• 💵 Exemption from Repayment with Outstanding Achievements
  Japan Student Services Organization Mar. 2018
  日本学生支援機構奨学金 特に優れた業績による返還免除（全額）

RA, TA and Scholarships

• 💵 The ANRI Fellowship 🔗
  Nov. 2020
• 👨‍🔬 Senior Research Assistant
  Apr. 2020 – Mar. 2023, National Institute of Informatics
• 👨‍🏫 Teaching Assistant: Information Science I
  Sep. 2016 – Mar. 2017, Faculty of Science, Tohoku University

Skills

Python	5 years	Chainer, sklearn, openCV for research.
Julia	3 years	Numerical calculation
Mathematica	6 years	Wolfram Language for formula processing.
Fortran90	half-year	Numerical calculation
C/C++	2 years	Numerical calculation
Linux	6 years	Ubuntu for development

Professional Activities

• 2026
  • Organizer of PhD summer school in DTU,
    02901 Advanced Topics in Machine Learning: Tensor Networks for Data Science
• 2023
  • AIP Challenge Committee Member in 2023
• 2022
  • Support Staff in SIG‑FPAI 2022, 27 – 30 Sep. 2022

📝 Reviews