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Seeking a Research Scientist or Postdoctoral Researcher (R-CCS2022)


Processor Research Team
RIKEN Center for Computational Science
(Team Leader: Kentaro Sano)

Research field

RIKEN Center for Computational Science (R-CCS), led by Center Director Satoshi Matsuoka, is an international research center in high performance computing and computational science in Japan. Our objectives are to investigate “the Science of (high performance) computing, by computing, and for computing”, to research and develop our technologies (R-CCS technology) and software (R-CCS software), which we consider our core competence, in order to produce world-leading scientific and engineering results for use in Japan as well as globally.

Also, R-CCS started operating Japan’s national flagship supercomputer Fugaku, as a shared national facility to support a wide range of research activities since 2021.

The Processor Research Team ("Processor team") conducts researches to investigate and develop

  • -novel computer architectures,
  • -hardware systems,
  • -their computing/programming models, and
  • -system software,

in order to explore next-generation high-performance computing systems which are suitable in the forthcoming Post-Moore era, where semiconductor scaling with Moore's law almost fails. For example, we research and develop new non-von-Neumann computers based on the wired-logic (or we call Spatial) data-flow computing model, by building a prototype system with FPGA cluster as accelerators for computing and networking, to complement and/or expand the existing HPC architectures such like the supercomputer Fugaku.

Job title and job descriptions

Job title

Research Scientist* or Postdoctoral Researcher: A few positions Research Scientist

Job description

Conduct researches regarding novel computer architectures, hardware systems, their computing models, programming models, system software, and/or their applications, toward an exploration of next-generation HPC systems which are promising in the forthcoming Post-Moore era. Conduct the researches not only within our research team, but also in cooperation with researchers of other R-CCS teams, domestic and foreign laboratories, universities, and companies. For example, by using our own FPGA cluster with 16 Stratix10 FPGAs, conduct researches on the following themes:

  • 1.Research on HPC programming for reconfigurable devices such like FPGAs. Explore methodologies to allow FPGAs to perform high-performance computing for some parts of software programs by using an HLS compiler for FPGAs. This theme includes research and development of hardware systems which are necessary for HPC on FPGAs (such like FPGA Shell, and hardware modules for FPGAs).
  • 2.Research on system software for resource management and task scheduling in a system where a lot of reconfigurable devices are connected by dedicated networks, such like an FPGA cluster.
  • 3.Research on application development and evaluation for the above system of 1, 2, and our own FPGA cluster with 16 Stratix10 FPGAs. Explore new application fields for reconfigurable HPC as well as investigating applicability and suitability of the above system to a wide range of high-performance computing problems including AI and combinational-problem solvers.

In addition to the above research and development, take charge of various tasks in Processor team and R-CCS.


Applicants must have a Ph.D. or expect to receive a Ph.D. before the date of appointment. In general, those who earned a doctorate within the past 5 years will be appointed as Postdoctoral Researchers, and those who earned a doctorate more than 5 years ago will be appointed as Research Scientists.
Processor team is interested in skilled and motivated applicants who have expertise and knowledge in computer architectures, system software such as compilers and schedulers, and OS. Applicants with deep background and experience of the above R&D, and necessary skills of software programming, circuit design and implementation in HDL, and hardware development with FPGAs are also considered with a great plus. Expertise with other related research areas is also considered. Excellent communication skill in English (or Japanese) is required. Such applicants are desired, who are proactive in exploring and expanding research themes by themselves.

Work location

Branch and address

RIKEN Center for Computational Science
6-3-5, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, JAPAN

Salary and benefits

  • 1.(Postdoctoral Researcher) One-year fixed-term employment contract, renewable based on evaluation, up to five years since the initial date of hire.
  • 2.(Research Scientist) One-year fixed-term employment contract, renewable based on evaluation, up to seven years since the initial date of hire.
  • 3.RIKEN may adjust the above maximum period of renewability based on a) the employee’s abilities, work load at the time of contract completion, performance and work attitude and b) the continuation of the employee’s center, laboratory or project and RIKEN’s management situation and budget at the time. In principle, employment contracts will not be renewed for individuals older than 65 years.
  • 4.The employee’s period of fixed-term employment cannot exceed 10 years from the initial date of hire (or 10 years from April 1, 2013 for fixed-term employees already at RIKEN prior to this date).

In principle, the first two months of employment is considered a trial period.
Salary will be commensurate with qualifications and experience. Commuting and housing allowances will be provided. Social insurance will be applied. Mandatory membership in the RIKEN Mutual Benefit Society (RIKEN Kyosaikai).
This position falls under the specialized duties discretionary work system; one working day will be calculated as 7 hours and 30 minutes.
Days off include public holidays, New Year's holidays (Dec. 29 - Jan 3), and RIKEN Foundation Day.

No smoking on site (designated smoking areas available).
These and other provisions are in accordance with RIKEN regulations.

RIKEN is promoting a Gender Equality Program by taking various measures to create a workplace where both men and women are able to give full rein to their talents and abilities. When applicants are judged to be equally qualified on the basis of fair and impartial criteria, women applicants will be given preference.

Also, eligible for an exemption from repayment for category 1 scholarship loans provided by the Japan Student Services Organization before fiscal year 2003, and eligible applying for the MEXT Grants-in-Aid for Scientific Research (Kakenhi).

Application and required documents

Applications are accepted by email only. However, when the application documents are too large to submit by email, it is recommended to employ file transfer services on the internet. Before submitting the applications, make sure the documents are encrypted and send us the password information separately. Upon receipt, we will check whether all the required documents are included and send an acknowledgement of receipt. If you do not receive the acknowledgement email, please contact us at the email address in "Contact information" below.
We recommend applicants to contact us by email on employment conditions and subjects of research/development in advance to your formal application.

Required documents

Please prepare the following documents in English.

  • 1.CV
    No format specified. Please make sure to include applicant’s name, date of birth, nationality, academic background, work history including the applicant’s current affiliation, and email address.
  • 2. List of research achievements
    Include not only peer-reviewed papers but also awards and competitive funds received, achievements in research while working in the private sectors. Also include quantitative evaluation indexes such as the Google Scholar citation index as much as possible.
  • 3. Copies of up to five most important publications (Please mark the papers on the list of publications.)
    When the original publications are not in PDF format, scan the papers and save them as PDF documents prior to submission.
  • 4. Description of previous research, future research plans, and career goals: No format specified, approximately three to four A4 pages in total. It is desirable that a diagram describing the research is provided.
  • 5.Recommendation letter(s) (in English) from one or two individual(s) with their signatures
    One recommendation letter should be written by the applicant’s current supervisor. When it is difficult to do so, a recommendation letter written by a third party may be accepted. The letter should be addressed to the R-CCS Director. Digital signature image should be embedded in the recommendation letters within the PDF file.
  • 6. Consent form for handling personal information based on GDPR
    If you are a resident of the European Economic Area (EEA), you are required to submit the document, "Consent form for handling personal information based on GDPR" with your signature.

    *You will find detailed information about General Data Protection Regulation (GDPR) on the following website:
    Data protection | European Commission


Applications will be accepted until the positions are filled.

Handling Personal Data

Submitted documents are strictly protected under the RIKEN Privacy Policy and will be used only for the purpose of applicant screening. Personal information will not be disclosed, transferred or loaned to a third party under any circumstances without just cause.

Selection process

Applications will be reviewed upon receipt, and interviews will be conducted for selected applicants (2 interviews for Research Scientist position and one interview for Postdoctoral Researcher position.) No inquiries on the selection process and results will be answered.

Start of employment

As early as possible (Negotiable)


Application files will not be returned.

Updated as of Apr 6, 2021: "Research Field" and "Required documents"
Updated as of Apr 22, 2021: "Contact Information / Send application to"

Contact Information / Send application to

Combine all the application documents into a single PDF document and submit to the email address below.
Email: kobe-jobs [at] riken.jp

Please use the subject line “[R-CCS2022] R-CCS Processor Research Team – Research Scientist” or “[R-CCS2022] Processor Research Team – Postdoctoral Researcher” when applying.

For inquiries on research conducted by the team, please contact the Team Leader by email:
Dr. Kentaro Sano
Processor Research Team
RIKEN Center for Computational Science
Email: kentaro.sano [at] riken.jp