1. Home
  2. Research
  3. Centers & Labs
  4. RIKEN Center for Computational Science
  5. Operations and Computer Technologies Division

RIKEN Center for Computational Science Facility Operations and Development Unit

Unit Leader: Toshiyuki Tsukamoto

Research Summary

Toshiyuki  Tsukamoto

Supetcomputer constantly consumes large amounts of electricity and the power changes into heat. Providing a stable supply of the consumed power and reliably eliminating the waste heat will draw out the full potential of the supercomputer.

Facility Operations and Development Unit performs maintenance and management of electrical and cooling facilities to ensure stable operation of our supercomputer. We are also working on R&D for maintaining an optimal working environment by combining steam-driven absorption refrigeration and inverter turbo refrigeration equipment, together with the operation of two 5000kW-class cogeneration systems.

Main Research Fields

  • Engineering

Related Research Fields

  • Informatics
  • Interdisciplinary Science & Engineering


  • PUE (Power Usage Effectiveness)
  • Power Consumption
  • Thermal load

Selected Publications

  • 1.Atsuya UNO, Hajime HIDA, Fumio INOUE, Naoki IKEDA, Toshiyuki TSUKAMOTO, Fumichika SUEYASU, Satoshi MATSUSHITA, Fumiyoshi SHOJI.:
    “Operation of the K computer Focusing on System Power Consumption”
    IPSJ Transactions on Advanced Computing Systems Vol.8, No.4, pp.13-25 (Nov 2015)
  • 2.Fumiyoshi Shoji, Shuji Matsui, Mitsuo Okamoto, Fumichika Sueyasu, Toshiyuki Tsukamoto, Atsuya Uno, Keiji Yamamoto.:
    “Long term failure analysis of 10 Petascale supercomputer”
    ISC2015 HPC IN ASIA POSTER AWARD, 2015-7, Frankfurt, Germany.
  • 3.Keiji Yamamoto, Atsuya Uno, Hitoshi Murai, Toshiyuki Tsukamoto, Fumiyoshi Shoji, Shuji Matsui, Ryuichi Sekizawa, Fumichika Sueyasu, Hiroshi Uchiyama, Mitsuo Okamoto, Nobuo Ohgushi, Katsutoshi Takashina, Daisuke Wakabayashi, Yuki Taguchi and Mitsuo Yokokawa.:
    “The K computer Operations: Experiences and Statistics”
    ICCS2014, 2014-6, Cairns, Australia.

Related Links

Lab Members

Principal investigator

Toshiyuki Tsukamoto
Unit Leader

Core members

Shinichi Miura
Technical Scientist
Satoshi Matsushita
Technical Staff I
Katsuyuki Tanaka
Technical Staff I
Makoto Igasaki
Technical Staff I
Fumio Tsuda
Technical Staff I
Mitsuo Iwamoto
Technical Staff I

Contact Information

Email: r-ccs-koho [at] ml.riken.jp