Centers & Labs

RIKEN Center for Computational Science

Processor Research Team

Team Leader: Kentaro Sano (Ph.D.)
Kentaro  Sano(Ph.D.)

To achieve high-performance computing with K computer, we need to use more than 80,000 computing nodes connected by a network so that they cooperate with each other by communicating data. However, the overall performance may be degraded by the big overhead for global communication and synchronization among nodes. In our research team, we develop a new parallel computing model and its software stacks based on localized communication and synchronization to achieve large-scale computing with less performance degradation, by introducing.

Main Research Field


Related Research Fields

Informatics / Interdisciplinary science and engineering


  • Computer Architecture
  • Parallel Processing System
  • Reconfigurable Computing
  • High-Level Synthesis
  • Hardware Algorithms

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.
  1. *Kentaro Sano and Satoru Yamamoto:
    "FPGA-based Scalable and Power-Efficient Fluid Simulation using Floating-Point DSP Blocks"
    IEEE Transactions on Parallel and Distributed Systems (TPDS), DOI: 10.1109/TPDS.2017.2691770, accepted (2017).
  2. *Tomohiro Ueno, Kentaro Sano, and Satoru Yamamoto:
    "Memory Bandwidth Compressor for FPGA-based High-Performance Custom Stream Computation"
    ACM Transactions on Reconfigurable Technology and Systems (TRETS), accepted (2017).
  3. *Kohei Nagasu, Kentaro Sano, Fumiya Kono, and Naohito Nakasato:
    "FPGA-based Tsunami Simulation: Performance Comparison with GPUs, and Roofline Model for Scalability Analysis"
    Journal of Parallel and Distributed Computing, DOI:10.1016/j.jpdc.2016.12.015, accepted (2016).
  4. *Kentaro Sano, Yoshiaki Hatsuda and Satoru Yamamoto:
    "Multi-FPGA Accelerator for Scalable Stencil Computation with Constant Memory-Bandwidth"
    IEEE Transactions on Parallel and Distributed Systems (TPDS), vol.25, no.3, DOI: 10.1109/TPDS.2013.51, pp.695-705 (2014).
  5. *Yoshiaki Kono, Kentaro Sano and Satoru Yamamoto:
    "Scalability Analysis of Tightly-Coupled FPGA-Cluster for Lattice Boltzmann Computation"
    Proceedings of the 22nd International Conference on Field-Programmable Logic and Applications (FPL2012), paper# W3B1, 8 pages (2012).
  6. *Kentaro Sano, Yoshiaki Hatsuda and Satoru Yamamoto:
    "Scalable Streaming-Array of Simple Soft-Processors for Stencil Computations with Constant Memory-Bandwidth"
    Proceedings of the 19th Annual IEEE Symposium on Field-Programmable Custom Computing Machines (FCCM2011), pp.234-241 (2011).
  7. *Kentaro Sano, Wang Luzhou, Yoshiaki Hatsuda, Takanori Iizuka and Satoru Yamamoto:
    "FPGA-Array with Bandwidth-Reduction Mechanism for Scalable and Power-Efficient Numerical Simulations based on Finite Difference Methods"
    ACM Transactions on Reconfigurable Technology and Systems (TRETS), vol.3, no.4, article no.21, DOI:10.1145/1862648.1862651, (2010).

Lab Members

Principal Investigator

Kentaro Sano
Team Leader

Core Members

Tomohiro Ueno
Postdoctoral Researcher
Takaaki Miyajima
Postdoctoral Researcher
Jens Christoph Huthmann
Postdoctoral Researcher

Contact information

Kobe Center for Medical Innovation
6-3-5 Minatojima-minami-machi, Chuo-ku,
Kobe, Hyogo
650-0047 Japan

Email: kentaro.sano [at]

Related links