First Bulletin

UGRP2026 Annoucement

Dear Colleagues,

We are pleased to announce UGRP2026, the international workshop of the MEXT Grant-in-Aid for Transformative Research Area (A), "Investigation of the Origin and Evolution of Matter in the Universe by Extremely Rare Events (UGRP2026)". The workshop will be held as follows, and we warmly encourage your participation.

Workshop

Web site:https://www.lowbg.org/ugrp/workshop/am2026/index.html
Date: Sep. 28 (Mon), 2026, around 12:00 – Sep. 30 (Wed), 2026, around 16:00
Venue: Ookayama Campus, Science Tokyo
In this research area, we aim to address fundamental questions about the history of the universe and the evolution of matter, such as:

• Why does only matter survive, while antimatter appears to be absent?
• What is the nature of dark matter, which constitutes about five times more than ordinary matter?
• How were heavy elements, which did not exist in the early universe, produced and distributed?

These questions will be investigated through the world’s most sensitive searches for extremely rare events, including: neutrinoless double beta decay, direct detection of dark matter, and observation of supernova neutrinos.

Main Topics

• Neutrinoless double beta decay
• Identification of dark matter as an unknown gravitational source
• Supernova neutrino observation and supernova early warning
• Analytical techniques, including ultra-low background technologies, as a basis for rare-event searches and their applications
• Theoretical studies to systematize the origin and evolution of cosmic matter based on rare-event research

Registration

We invite poster presentations to encourage interdisciplinary collaboration across a broad range of fields.
Please register from the following page:

https://www.lowbg.org/ugrp/workshop/am2026/index.html?LangP=EN&InputContents=Reg

Deadline for poster abstract submission and banquet registration: August 28 (Fri), 2026
Deadline for registration: September 18 (Fri), 2026
The number of poster presentations is limited. In the case of a large number of submissions, up to 40 posters will be accepted.

Registration fee: Free of charge
Banquet fee: Expected to be less than 3,000 JPY


We look forward to your participation in the workshop.

LOC members,
Yasuhiro Kishimoto (Research Center for Neutrino Science, Tohoku University; Chair)
Koji Ishidoshiro (Research Center for Neutrino Science, Tohoku University)
Saori Umehara (Research Center for Nuclear Physics, The University of Osaka / Nagoya University)
Shingo Kazama (Institute of Science Tokyo)
Tatsuhiro Naka (Toho University)
Hiroyuki Sekiya (Institute for Cosmic Ray Research, The University of Tokyo)
Yasuo Takeuchi (Kobe University)
Ryosuke Sato (The University of Osaka)
Yudai Suwa (The University of Tokyo)
Hiroyuki Fujioka (Institute of Science Tokyo)