Seeking a Contract Researcher or Postdoctoral Researcher(W706)

Research field and overview

The group conducts operation, maintenance, and improvement of core research instruments and related infrastructure at the RI Beam Factory (RIBF) accelerator facility of the RIKEN Nishina Center for Accelerator-Based Science. It also conducts related R&D studies on the research instruments. For details, refer to the laboratory homepage.

Job title, available positions and job description

Job title, available positions

One opening for a Contract Researcher or a Postdoctoral Researcher
Contract Researcher is defined as those who obtained a doctoral degree more than 5 years ago.
Postdoctoral Researcher is defined as those who obtained a doctoral degree less than 5 years ago.

Job description

We are seeking a contract researcher who provides technical support for users of the RIBF facility through the delivery of radioactive-isotope (RI) beams utilizing the RI separator BigRIPS, maintenance and management of such core instruments, and related research and development (R&D). The R&D studies include nuclear-reaction studies with RI beams, new isotope/isomer searches, and nuclear structure studies of unstable nuclei, among other experimental investigations. The successful candidate will work as a member of the BigRIPS Team in the Research Instruments Group, RIKEN Nishina Center for Accelerator-Based Science.


The candidate should possess a doctoral degree in science or engineering, or is a prospective PhD candidate who is scheduled to obtain a doctoral degree in science or engineering before the first day of work. The successful candidate is expected to conduct works actively and steadily under the smooth cooperation with persons involved from inside/outside of RIKEN. Experiences in RI beam production and nuclear-physics studies using an accelerator will be regarded positively. RIKEN welcomes applications from oversea candidates.

Work location

Branch and address
RIKEN Wako (2-1 Hirosawa, Wako, Saitama 351-0198)

Salary and benefits

  1. One year fixed-term employee contract renewable based on evaluation up to maximum of 5 years from initial date of hire.
  2. 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.
  3. 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).
  4. Depending on the review of the Employee‘s research results on its third year, the employment contract may not be renewed beyond the third year.

The salary system is annual and will be commensurate with qualifications and experience. Commuting and housing allowances will be provided. Social insurance will apply. Mandatory membership in the RIKEN Mutual Benefit Society (RIKEN Kyosaikai) is required.
Days off include public holidays, New year's holidays (Dec. 29-Jan. 3), and RIKEN Foundation Day.
These and other provisions are in accordance with RIKEN regulations.

*RIKEN promotes a Gender Equity Program by taking various measures to create an equitable workplace where both men and women are able to give full rein to their talents and abilities. When the abilities of candidates are judged to be equivalent through a fair and impartial evaluation process, preference will be given to females.
*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 for applying for MEXT Grants-in-Aid for Scientific Research (Kakenhi)

Application and required documents

Required documents

  1. Complete CV (with photo and email address)
    Write down in the notes section of your CV the number written next to the title of the job position (W706).
  2. List of research achievements and publications
  3. A letter of recommendation including one from the current supervisor
    (If the current supervisor's recommendation is not available, a recommendation letter from a third party will be accepted)
  4. Summary of major achievements to date and research proposal in future (two pages A4 sized paper, respectively)

How to apply

Send the PDF formatted application by email to ueno[at]
Note: Application documents will not be returned.


Open until the position is 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

Application screening and interview for selected applicants

Start employment

As early as possible

Contact information/Send application to

RIKEN Nishina Center for Accelerator-Based Science
Research Instruments Group
2-1 Hirosawa, Wako, Saitama 351-0198
Email: ueno[at] (Replace [at] with @ )
For inquiries, please send an email.