Welcome to CLEEDI 2026 Japan site!

Since 2021, we have organised biennial CLEEDI workshops in the Pyrenees, where we meet in person and exchange ideas organically between theory and data, in order to explore the interior and surface of the Earth and other telluric bodies.

We keep the number of formal presentations limited (one keynote talk or panel discussion each morning) and dedicate the remaining time to small-group discussions, code and data sharing, and testing new ideas, or spontaneous formations. The wrap-up sessions are among the most important moments of the workshop, as they allow us to discuss future plans, including formal collaborations and major project proposals.

Exceptionally, this year’s CLEEDI workshop will take place at Mount Fuji, with a final wrap-up session in Tokyo. We seek for theoretical and observational contributions around the subduction and volcanoes from different angles. Do not worry: the 2027 edition will return to the Pyrenees, France.

As many former participants wondered when they were first invited to CLEEDI, you may be wondering what to expect — and what to do.

CLEEDI is a small village of geo-scientists who want to propose new, sometimes crazy, ideas to bridge the gap between theory and data. For instance, how a volcano formed geodynamically is still poorly constrained by present-day observations, despite dense seismic arrays and geochemical datasets. Could modellers look more closely at how real data are processed? Could observers see what kinds of precision, assumptions, and constraints modellers need to build dynamical models?

How do seismic signals look when we propagate waves through conceptual models proposed by volcanologists, while accounting for uncertainties in petrological look-up tables? Can we communicate quantitatively across disciplines?

CLEEDI provides a place not only to discuss these questions, but also to exchange small datasets and codes, so that we can take the first step towards real collaboration.

With up to 550 euros of participation fees, we will cover your stay in Yamanaka-ryo, University of Tokyo. However, the house is equiped with rooms for several people and if you prefer a hotel that is situated 10-min walk, you might need to precise. As the price does not differ very much (as a funciton of the number of participants), we try to cover those who will prefer hotel rooms with more or less the same price. Please precise when you register.

During your stay in Mount Fuji, we will collect up to ~550 euros for housing, food, seminar rooms, optional field trip. The real cost will be communicated once we fix the number of participants. We will also communicate how to pay after the closing of this contribution call. No supports for Tokyo-Mt. Fuji transportations nor housing in Tokyo for the wrap-up session for Tuesday 17th at ERI.

Please note that the calendar can change and we will communicate only to participants after some point. 

Before CLEEDI 

IPGP-ERI workshop (closed) Mon 9th - Tue 10th November 2026 @ ERI Tokyo

• Outreach concert (open) Tue 10th November @ somewhere in Tokyo 

CLEEDI2026 Japan starts:

Wednesday 11th evening

BBQ with IPGP-ERI @ Yamanaka-ryo of University of Tokyo, Mount Fuji

Thursday 12th 

CLEEDI2026 starts @ Yamanaka-ryo

optional: field trip with IPGP-ERI 

10h30-19h work

Friday 13th

9h-10h30 keynote on volcanology

10h30-19h work

Saturday 14th

9h-11h panel discussion

10h30-19h work

Sunday 15th

9h-12h work 

12h lunch by ourselves to head to Tokyo

Monday 16th

Off, or preparation for the next day @ ERI, U Tokyo(some rooms available)

Tuesday 17th

10h-17h wrap-up session @ ERI, U Tokyo

Nobuaki Fuji, Institut de physique du globe de Paris, Université Paris Cité / Institut universitaire de France

Yosuke Aoki, Earthquake research institute, University of Tokyo

Kurama Okubo, National Research Institute for Earth Science and Disaster Resilience 

Laëtitia Le Pourhiet, Sorbonne Université

Jean-Arthur Olive, École normale supérieure

John Hernlund, Earth-Life Science Institute, Institute of Science Tokyo

Support:

Masataka Kinoshita, Earthquake research institute, University of Tokyo

Yoko Teruhara, Earthquake research institute, University of Tokyo