Takuma OTSUKA

Research Scientist. Ph.D. (Informatics)
Learning and Intelligent Systems Research Group
Innovative Communication Laboratory
NTT Communication Science Laboratories


Contact:
takuma.otsuka [at] ieee.org
takuma.otsuka [at] ntt.com
2-4 Hikaridai, Seika, Souraku, Kyoto 619-0237 JAPAN
my pic

Research Interests

  • Machine learning using probabilistic models and their optimization methods for handling real-world phenomena with computers
  • Applications to material informatics, human traffic control, acoustic audio signal processing etc.

Bio

2014.4--PresentNTT Communication Science Laboratories
2011.4--2014.3Research fellow of Japan Society for Promotion of Science (DC1)
2011.4--2014.3Okuno-Ogata Lab. Graduate school of Informatics, Kyoto University, doctoral course
2009.4--2011.3Okuno-Ogata Lab. Graduate school of Informatics, Kyoto University, master's course
2005.4--2009.3Undergraduate School of Informatics and Mathematical Science, Kyoto University

Awards

  • Advanced Robotics Best Paper Award 2016
  • IWSEC Best Paper Award 2013
  • NTF Award for Entertainment Robots and Systems 2010
  • Outstanding Paper Award for Young C&C Researchers 2010

List of publications

Google Scholar
DBLP

Selected papers are listed below.

  • Journal papers
  • Conference papers
  • Books
  • Activities

Journal papers

  1. Y. K. Wakabayashi*, T. Otsuka*, Y. Krockenberger, H. Sawada, Y. Taniyasu, H. Yamamoto: "Stoichiometric growth of SrTiO3 films via Bayesian optimization with adaptive prior mean" APL Machine Learning 1, 026104 (2023). link *equal contributions.
  2. Y. K. Wakabayashi*, T. Otsuka*, Y. Krockenberger, H. Sawada, Y. Taniyasu, H. Yamamoto: "Bayesian optimization with experimental failure for high-throughput materials growth" npj Computational Materials 8, 180 (2022). link *equal contributions.
  3. K. Takiguchi, Y. K. Wakabayashi, H. Irie, Y. Krockenberger, T. Otsuka, H. Sawada, S. A. Nikolaev, H. Das, M. Tanaka, Y. Taniyasu, and H. Yamamoto: "Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide" Nature Communications 11, 4969 (2020) link
  4. S. Yokoi, T. Otsuka, I. Sato: "Weak approximation of transformed stochastic gradient MCMC" Machine Learning 109(9-10): 1903-1923 (2020)
  5. Y. Bando, T. Otsuka, T. Mizumoto, K. Itoyama, M. Konyo, S. Tadokoro, K. Nakadai, H. G. Okuno: "Posture estimation of hose-shaped robot by using active microphone array" Advanced Robotics 29(1): 35-49 (2015)
  6. T. Otsuka, K. Ishiguro, T. Yoshioka, H. Sawada, H. G. Okuno: "Multichannel sound source dereverberation and separation for arbitrary number of sources based on Bayesian nonparametrics" IEEE ACM Transactions on Audio Speech and Language Processing 22(12): 2218-2232 (2014)
  7. T. Otsuka, K. Ishiguro, H. Sawada, H. G. Okuno: "Bayesian Nonparametrics for Microphone Array Processing" IEEE ACM Transactions on Audio Speech and Language Processing 22(2): 493-504 (2014)

Peer-reviewed conference papers

  1. T. Otsuka, H. Shimizu, T. Iwata, F. Naya, H. Sawada, N. Ueda: "Bayesian Optimization for Crowd Traffic Control Using Multi-Agent Simulation" ITSC 2019: 1981-1988
  2. M. Blondel, V. Niculae, T. Otsuka, Naonori Ueda: "Multi-output Polynomial Networks and Factorization Machines" NIPS 2017: 3349-3359
  3. D. Sakaue, T. Otsuka, K. Itoyama, H. G. Okuno: "Initialization-robust Bayesian multipitch analyzer based on psychoacoustical and musical criteria" ICASSP 2013: 226-230
  4. K. Furukawa, K. Okutani, K. Nagira, T. Otsuka, K. Itoyama, K. Nakadai, H. G. Okuno: Noise correlation matrix estimation for improving sound source localization by multirotor UAV. IROS 2013: 3943-3948
  5. T. Otsuka, K. Ishiguro, H. Sawada, H. G. Okuno: "Bayesian Unification of Sound Source Localization and Separation with Permutation Resolution" AAAI 2012
  6. T. Otsuka, K. Nakadai, T. Takahashi, K. Komatani, T. Ogata, H. G. Okuno: Design and Implementation of Two-level Synchronization for Interactive Music Robot. AAAI 2010

Books

  1. Translation of B. Efron, T. Hastie "Computer Age Statistical Inference." from Kyoritsu Shuppan (2020) Chapters 12 & 13 website (ja)

Activities

  1. IBIS Workshop 2020 Program Committee
  2. Annual Conference of the Japanese Society for Artificial Intelligence 2020 Program Committee
  3. IBIS Workshop 2017 Program Committee
  4. Reviews: NeurIPS, AI/STATS, ICML, AAAI, IJCAI, ICASSP, IEEE TASLP etc.