Seeking Senior Scientist, Research Scientist or Postdoctoral Researcher (R-CCS2025)
Large-Scale Parallel Numerical Computing Technology Research Team
RIKEN Center for Computational Science
(Team Leader: Toshiyuki Imamura)
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 Large-scale Numerical Parallel Computing Research Team conducts research and development of a highly advanced numerical library to maximize the hardware potential of the flagship-class supercomputer systems such as “K” and “Fugaku”, particularly, focusing on performance and accuracy.
Job title and job descriptions
Senior Scientist, Research Scientist, or Postdoctoral Researcher
We are seeking a few persons who can engage in one or more of the following three jobs related to numerical algorithms and software, which will dirve the next generation of computational science:
- 1.R&D on eigenvalue calculation algorithms leveraging next-generation computer technology
- 2.R&D on the overall aspects of computational accuracy, including low, high, and mixed precision calculations
- 3.R&D on the realization of numerical libraries for Fugaku and next-generation computing systems of general interest.
The position requires a Ph.D. (including those who will take a degree before arriving at the post.) If it has been 5 years or less since your acquisition of Ph.D. degree, you will be employed as a Postdoctoral Researcher. Senior Scientist position is considered for those who have more than 5 years of work experience in a specialized field and the ability to supervise other team members or equivalent/higher abilities to accomplish the offered topics, such as numerical linear algebra, numerical error analysis, and numerical verification. The candidate also should have good experience computer programming using C, C++, or Fortran. It is preferable to have the experience of parallel programming/tuning using MPI or OpenMP. Communication in English (or Japanese) is required.
Branch and address
RIKEN Center for Computational Science
7-1-26, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, JAPAN
Salary and benefits
- 1.(Senior Scientist or Research Scientist) One-year fixed-term employment contract, renewable based on evaluation, up to seven years since the initial date of hire. We plan to evaluate in the sixth year. Depending on the evaluation results, there is a possibility that it will be extended beyond seven years.
- 2.(Postdoctoral Researcher) One-year fixed-term employment contract, renewable based on evaluation, up to five years since the initial date of hire.
- 3.RIKEN will decide whether to enter into a new contract on the basis of the employee's abilities, work load, performance, work attitude, continuation of the center, laboratory or project in which the employee is involved at the time of termination of the original contract, and on the basis of RIKEN's situation and budget conditions 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.
RIKEN has introduced telework as a temporary and special measure to prevent the spread of COVID-19. You may be asked to work from home according to the instructions of the institute. You can also choose to work from home with the permission of your supervisor.
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.
Please prepare the following documents in English.
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.
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.
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.
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.
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.
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
Until the final candidate is found.
Handling Personal Data
All private data sent to RIKEN in application for employment will be handled in strict confidentiality, and such data will not be utilized for any other purpose or disclosed to any third party. Application documents will not be returned.
Applications will be reviewed upon receipt, and interviews will be conducted for selected applicants (2 interviews for Senior Scientist and Research Scientist position, one interview for Postdoctoral Researcher position.) No inquiries on the selection process and results will be answered.
Start of employment
At the earliest possible time (negotiable).
Application files will not be returned.
Updated as of Apr 6, 2021: "Research Field" and "Required documents"
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 “Large-scale Parallel Numerical Computing Technology Research Team - Application to (name of the position eg.Postdoctoral Researcher” when applying.
For inquiries on research conducted by the team, please contact the Team Leader by email:
Large-scale Parallel Numerical Computing Technology Research Team
RIKEN Center for Computational Science
Email: imamura.toshiyuki [at] riken.jp