Dear Colleagues, The RIKEN Centre for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS; ithems.riken.jp), located near Tokyo, Japan, is currently accepting applications for the 2027 Special Postdoctoral Researcher (SPDR) programme. These are highly competitive 3 year positions, with an expected start date between April 1st, 2027 and March 31st, 2028. SPDRs are fully independent researchers and are expected to design and lead their own research projects. In addition to a monthly salary of 550,000 JPY and other benefits, each SPDR receives a research budget of 1,000,000 JPY per year, with further funds available (see site for details). SPDRs are also eligible to apply for their own internal and external, domestic and international grants and other funding opportunities. Complete details about RIKEN's SPDR programme can be found here: https://www.riken.jp/en/careers/programs/spdr/career2027/ Within RIKEN, iTHEMS promotes interdisciplinary collaborations among theoretical and computational scientists from diverse fields including mathematics, physics, biology, computer science, etc. Interactions are encouraged through daily activities such as journal clubs, seminar series, study/working groups, workshops, and international research collaborations. Any iTHEMS researcher can propose new collaborative activities around any topic of common interest. SPDR candidates interested in being hosted in iTHEMS should contact their potential host prior to submitting their application. Of most relevance to this mailing lists are the iTHEMS laboratories of: Catherine Beauchemin (biophysics/math biology/infectious diseases) https://ithems.riken.jp/en/members/catherine-beauchemin cbeau@riken.jp Leo Speidel (mathematical genomics) https://ithems.riken.jp/en/members/leo-speidel leo.speidel@riken.jp Yohsuke Murase (mathematical social science/game theory) https://ithems.riken.jp/en/members/yohsuke-murase yohsuke.murase@riken.jp Your proposed research does not necessarily need to align with that of your host, but you should identify strong potential for collaborations with members of the host laboratory. You are encouraged to directly contact iTHEMS members whose research is close to your own, to establish a direct connection and explore possible collaborations. This will strengthen your application. Consider, for example, Gen Kurosawa (circadian rhythms), Kyosuke Adachi (biophysics/active matter), Eiryo Kawakami (medical mathematics/AI), Jos? Said Guti?rrez-Ortega (evolutionary biology/ecology), Isaac Planas Sitja (social insect modelling) or other iTHEMS researcher. A full list of iTHEMS researchers can be found here: https://ithems.riken.jp/en/members A full list of RIKEN researchers able to host SPDRs within and beyond iTHEMS can be found here: https://www.riken.jp/medialibrary/riken/careers/programs/spdr/career2027/host_lab.pdf Deadline for registering basic information 2026, April 2, Thursday, 5 p.m. (JST) Deadline for revising/uploading documents & letters of reference 2026, April 9, Thursday, 5 p.m. (JST) Catherine Beauchemin Deputy Director, iTHEMS, RIKEN, Saitama, Japan https://ithems.riken.jp/en/members/catherine-beauchemin Professor, Physics, Toronto Metropolitan University, Toronto, Canada https://www.torontomu.ca/physics/our-people/catherine-beauchemin/ thomas.hitchcock@riken.jp (to subscribe/unsubscribe the EvolDir send mail to golding@mcmaster.ca)