Seeking Postdoctoral Researcher or Contract Researcher (W18015)


Accelerator Group
RIKEN Nishina Center for Accelerator-Based Science
(Group Director: Osamu Kamigaito)

Research Field

The accelerator group is pursuing various upgrade programs of the world-leading heavy-ion accelerator facility, RI-Beam Factory (RIBF), to enhance the accelerator performance and operation efficiency. We are also promoting developments of the RIBF for applications to a variety of research fields.
For more information, please refer to the Accelerator Group web page.

Job title and Job description

Job title, available positions

Postdoctoral Researcher or Contract Researcher, maximum two positions.
Postdoctoral Researcher is defined as those who obtained a doctoral degree no more than 5 years ago.
Contract Researcher is defined as those who obtained a doctoral degree more than 5 years ago.

Job description

The successful candidates are to belong to either of the following two teams;
Beam Dynamics and Diagnostics Team or Accelerator R&D Team.
The successful candidates are expected to contribute to the improvement, operation, and maintenance of the RIBF accelerators. In order to enhance the performance of the RI Beam Factory further, they are also expected to carry out at least one of the following R&D items; magnet power supplies, beam diagnostic devices, thin film formation for charge stripping, high-intensity ion source of low-charged heavy ions, design study of a new cyclotron or the charge-stripper ring(*).
(*)Ring Charge Stripper PDF(2.07MB)

For more information, please refer to the following websites:


The candidate should possess a doctoral degree in the relevant field of research.

Work location

Branch and address

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

Salary and benefits

  1. A one-year fixed-term employment contract, renewable based on evaluation, to a maximum 5 years from the 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.

In principle, there will be a trial period of employment (2 months).
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.
These and other provisions are in accordance with RIKEN regulations.

RIKEN is promoting a Gender Equity 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

Required documents

  1. WORD (56KB) or EXCEL (58KB) (with photo and email address)
    Write the open call ID “W18015”, indicated in the parentheses next to the job title, in open call ID section in the upper right corner of your CV.
  2. List of achievements (Please categorize: Papers on refereed journal, Papers on non-refereed journal, Conference presentation, Patents, Competitive funds, Others)
  3. Copies of up to three most important publications
  4. Summary of R&D achievements to date (within two pages)
  5. R&D plan at RIKEN (within one page)
  6. 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)

How to apply

Send the PDF formatted application by email to kamigait [at]
(Recommendation letters must be emailed directly from the reference to kamigait [at]
Note: Application documents will not be returned.


Application must arrive by November 30, 2018

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, interview and oral presentation by selected applicants.

Start of Employment

April 1, 2019

Contact Information / Send application to

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