Seeking a Postdoctoral researcher(W847)

Research field and overview

Emergent Soft System Research Team (Team Leader: Dr. Takao Someya) focuses on making full use of the novel soft electronic materials such as novel organic semiconductors in order to fabricate emergent thin-film devices and, subsequently, to realize emergent soft systems that exhibit super-high efficiency. Now we are focusing on establishing photoelectric conversion devices with ultimate flexibility and/or light-weight. The target devices include flexible photodetectors, light-weight solar cells and integrated imaging systems.
We are thus seeking a highly motivated and experienced engineering scientist to join Emergent Soft System Research Team at RIKEN. Candidates must have Ph. D degree and are supposed to have experience related to fabricate organic devices and sensors, and device fabrication/evaluation.

Job title, available positions and job description

Job title, available positions

Postdoctoral researcher, one person

Postdoctoral Researcher is defined as those with a doctoral degree of 5 years or less. We hope the candidate has an expertise/experience in electrical or mechanical engineering. In addition, it is desirable that the candidate is motivated to promote research on the boundary area between electric and mechanical engineering.

Job description

Fabrication, evaluation and application of organic photoelectric conversion devices utilizing organic semiconductors. More specifically, integration of soft actuators with organic electronics (such as organic solar cells) to develop new soft robots.


The candidate should possess a doctoral degree of 5 years or less, or the candidate will be able to obtain a doctoral degree before the work start date.

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. When the center to which the Employee is affiliated is scheduled for a final review in FY2024 and it is decided that the Employee's research will not be continued, the provision given above for projects of limited duration applies and the Employee's contract will not be renewed for the FY2025 year that would extend employment beyond the center's final fiscal 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. Curriculum Vitae WORD(56KB) or EXCEL(58KB) (with photograph and e-mail address)
    *Write the 4 digit number beginning with “W847”, indicated in the parentheses next to the job title, in the open call ID section in the upper right corner of your CV.
  2. List of research achievement and publication
  3. Copies of five selected publications
  4. Summary of past achievements and future research plans in RIKEN (A4 format, within three pages)
  5. Recommendation letter for the current supervisor
    (If the current supervisor’s recommendation is not available, a recommendation letter from a third party will be accepted)
  6. E-mail or Postal address to which the result will be informed

How to apply

Send the PDF formatted application by email to: takao.someya [at]
Recommendation letters must be emailed directly from the reference to: takao.someya [at] (please replace[at]with @).
Note: Application documents will not be returned.


Position will be closed after suitable candidates are found.

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

Candidates will be selected based on research results, publications, and letters of recommendation, followed by interview.

Start employment

June 1, 2018 or later

Contact information/Send application to

RIKEN Center for Emergent Matter Science
Emergent Soft System Research Team
2-1 Hirosawa, Wako, Saitama 351-0198
Email: takao.someya[at] (please replace[at]with @)
For inquiries, please send an email.