1. Home
  2. Research
  3. Centers & Labs
  4. RIKEN Center for Computational Science

RIKEN Center for Computational Science Next Generation High Performance Architecture Research Team

Team Leader: Masaaki Kondo (Ph.D.)

Research Summary

Masaaki  Kondo(Ph.D.)

The continuous improvement in processing speed in high-performance computer systems such as the supercomputers K and Fugaku have been enabled by transistor scaling. This trend is known as Moore’s law. But Moore’s law is predicted to end in the near future. Hence, it is vital to research and develop novel and more efficient high performance computer systems if we are to continue realizing high performance computing in the future.

Based on the experience of hardware development and the existing software environment of the supercomputers K and Fugaku, we are researching and developing a next-generation high-performance computer architecture together with strategies to improve the power efficiency of exascale supercomputer systems. Currently, we are mainly focusing on non-von Neumann architectures such as systolic arrays and neuromorphic computers based on the latest advances in device technologies, architectures that can integrate next generation non-volatile memories and/or various types of accelerators into a general-purpose processor, the advancement of scientific simulations by accelerating machine learning computations, and hybrid computing architectures that combine the benefits of quantum computing and classical computing. And we are performing detailed co-design (coordinated design of hardware and software) evaluations of the computer architectures noted above as well as the co-design evaluations of algorithms that take advantage of them on the supercomputers K and Fugaku.

Main Research Fields

  • Informatics

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Engineering
  • Computer system
  • High performance computing
  • Software


  • Computer Architecture
  • Supercomputer
  • Parallel and distributed processing
  • Non-von Neumann architecture
  • Computing accelerator

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1.*Tsukada, M, Kondo, M., and Matsutani, H.:
    “OS-ELM-FPGA: An FPGA-Based Online Sequential Unsupervised Anomaly Detector”
    The 16th International Workshop on Algorithms, Models and Tools for Parallel Computing on Heterogeneous Platforms (HeteroPar'18). (2018)
  • 2.*Sakamoto, R., Patki, T., Cao, T., Kondo, M., Inoue, K., Ueda, M., Ellsworth, D., Rountree, B., and Martin Schulz.:
    “Analyzing Resource Trade-offs in Hardware Overprovisioned Supercomputers”
    32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS2018), 10 pages. (2018).
  • 3.*Wada, Y., He, Y., Cao, T., and Kondo, M.:
    “A Power Management Framework with Simple DSL for Automatic Power-Performance Optimization on Power-Constrained HPC Systems”
    SupercomputingAsia 2018 (SCA18), 20 pages. (2018).
  • 4.*Shresthamali, S., Kondo, M., and Nakamura, H.:
    “Adaptive Power Management in Solar Energy Harvesting Sensor Node using Reinforcement Learning”
    ACM Transactions on Embedded Computing Systems, Vol.16, No.5s, pp.181:1-181:21. (2017).
  • 5.*Sakamoto, R., Takata, R., Ishii, J., Kondo, M., Nakamura, H., Ohkubo, T., Kojima, T., and Amano, H.:
    “The Design and Implementation of Scalable Deep Neural Network Accelerator Cores”
    IEEE 11th International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC-17), 8 pages. (2017).
  • 6.*Sakamoto, R., Cao, T., Kondo, M., Inoue, K., Ueda, M., Patki, T., Ellsworth, D., Rountree, B., and Schulz, M.:
    “Production Hardware Overprovisioning: Real-world Performance Optimization using an Extensible Power-aware Resource Management Framework”
    31st IEEE International Parallel & Distributed Processing Symposium (IPDPS2017). 10 pages. (2017).
  • 7.*Cao, T., Huang, W., He, Y., and Kondo, M.:
    “Cooling-Aware Job Scheduling and Node Allocation for Overprovisioned HPC Systems”
    31st IEEE International Parallel & Distributed Processing Symposium (IPDPS2017), 10pages. (2017).
  • 8.*Ohkubo, T., Tanaka, T., Sakamoto, T., Kondo, M., and Amano, H.:
    “NAMACHA: A Software Development Environment for a Multi-Chip Convolutional Network Accelerator”
    32nd International Conference on Computers and Their Applications (CATA'17). (2017).
  • 9.*He, Y., Kondo, M., Nakada, T., Sasaki, H., Miwa, S., and Nakamura, H.:
    “A Runtime Multi-Optimization Framework to Realize Energy Efficient Networks-on-Chip”
    IEICE Transactions on Information and Systems, Vol.E99-D, No.12, pp.2881-2890. (2016).
  • 10.*Inadomi, Y., Patki, T., Inoue, K., Aoyagi, M., Rountree, B., Schulz, M., Lowenthal, D., Wada, Y., Fukazawa, K., Ueda, M., Kondo, M., and Miyoshi, I.:
    “Analyzing and Mitigating the Impact of Manufacturing Variability in Power-Constrained Supercomputing”
    The International Conference for High Performance Computing, Networking, Storage and Analysis (SC15), 2 pages. (2015)

Related Links

Lab Members

Principal investigator

Masaaki Kondo
Team Leader

Core members

Yuetsu Kodama
Senior Scientist
Yiyu Tan
Research Scientist

Contact Information

Kobe Center for Medical Innovation (KCMI)
7-1-26 Minatojima-minami-machi,
Chuo-ku, Kobe, Hyogo
650-0047, Japan
Tel: +81-(0)78-940-5840
Fax: +81-(0)78-304-4963
Email: masaaki.kondo [at] riken.jp