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Seeking a Postdoctoral Researcher or Research Scientist (W20144)


Extreme Natural Phenomena RIKEN Hakubi Research Team
RIKEN Cluster for Pioneering Research
(Team Leader: Teruaki Enoto)

Research Field

We apply measurement techniques of high-energy cosmic radiation to study extreme natural phenomena of the universe. Our three principal research projects are:

  • 1.High-energy atmospheric physics of lightning and thunderclouds.
  • 2.New X-ray astronomy using CubeSats.
  • 3.Search for water resources on the Moon using neutron signals.

The central idea behind these projects is the "collective power of science," which means organically connecting multiple instruments to produce scientific results, rather than a single massive detector. This term also reflects our desire to reinterpret science as a culture in collaboration with society, rather than a closed one in researchers, by utilizing academic crowdfunding and an open science framework. In this application, we seek applications for the third project to explore water resources on the Moon.

See details in the Extreme natural phenomena RIKEN Hakubi Research Team's website

Job title and Job description

Job title, available positions

Postdoctoral Researcher or Research Scientist 1 position

Postdoctoral Researcher is defined as those with a doctoral degree of 5 years or less.
Research Scientist is defined as those with a doctoral degree more than 5 years.

Job description

The applicant will participate in the planned research project "Development of Next Generation Neutron Water Monitor for Dual-Use in Lunar Exploration and Civil Engineering," collaborating with JAXA Space Exploration Innovation Hub Center (PI: Teruaki Enoto). This project includes developing new neutron detectors, preparing an instrumental response model, simulating the lunar radiation environment, performing demonstration and environmental testing for space usages, design development for Cubesats and lunar rovers, and various studies ground-based applications. Expertise in lunar and planetary science or radiation measurements in space is desirable. Applicants interested in the possibility of the first lunar astronomical observatory using gamma-ray measurements on the Moon surface will also be welcome to apply for this project as a spin-off of this research outcome. Applicants may proceed with their research as long as it does not interfere with the main project.


The candidate should possess a doctoral degree in a related field (physics, planetary science, or astronomy, etc), or expected to have a doctoral degree by the date of hire. Experience in space radiation measurements or lunar/planetary science is preferred.

Work location

Branch and address

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

Salary and benefits

  • 1.One-year fixed-term employment contract, renewable based on evaluation, up to the end of March 2024 from 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).

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

Required documents

  • 1.Complete CV or CV (with photo and email address)
    * Write the RIKEN job ad number “W20144”, indicated in the parentheses next to the job title, in the RIKEN job ad number section in the upper right corner of your CV.
  • 2.List of research achievement and publications
  • 3.Brief description of previous research and future research plans (within two A4-size pages)
  • 4.A letter of recommendation from the current supervisor (If unavailable, a letter from a substitute reference will be acceptable.)
  • 5.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

How to apply

Send the PDF formatted application by email to teruaki.enoto [at] riken.jp
(Recommendation letters must be emailed directly from the reference to teruaki.enoto [at] riken.jp)

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 of Employment

April 1st, 2021 (Negotiable).

Contact Information / Send application to

RIKEN Cluster for Pioneering Research
Extreme Natural Phenomena RIKEN Hakubi Research Team
2-1 Hirosawa, Wako, Saitama 351-0198
Tel: +81 (0)48 467 4022 / FAX: +81 (0)48 467 4598
Email: teruaki.enoto [at] riken.jp

For inquiries, please send an email.