The 25th workshop on General Relativity and Gravitation in Japan (JGRG25), Kyoto, Japan

JGRG is a series of annual workshops held in Japan since 1991. The main purpose of the workshop is to provide a place for exchanging ideas to pursue future trends of research. The workshop will cover a wide area of research related to general relativity and gravitation.

Invited Speakers:
Alberto Nicolis (Columbia U)
Wayne Hu (Chicago U)
Sean Hartnoll (Stanford)
Abhay Ashtekar (Penn State U)
Robert M. Wald (Chicago U)
Richard Schoen (Stanford U)

Scientific Organizing Committee:
Hideki Asada (Hirosaki),
Takeshi Chiba (Nihon),
Tomohiro Harada (Rikkyo),
Kunihito Ioka (KEK),
Akihiro Ishibashi (Kinki),
Hideki Ishihara (Osaka City),
Masahiro Kawasaki (ICRR, Tokyo),
Hideo Kodama (KEK),
Yasufumi Kojima (Hiroshima),
Kei-ichi Maeda (Waseda),
Shinji Mukohyama (YITP, Kyoto),
Takashi Nakamura (Kyoto),
Ken-ichi Nakao (Osaka City),
Yasusada Nambu (Nagoya),
Ken-ichi Oohara (Niigata),
Misao Sasaki (YITP, Kyoto),
Masaru Shibata (YITP, Kyoto),
Tetsuya Shiromizu (Nagoya),
Jiro Soda (Kobe),
Naoshi Sugiyama (Nagoya),
Takahiro Tanaka (Kyoto),
Masahide Yamaguchi (Titech),
Jun’ichi Yokoyama (RESCEU, Tokyo)

Local Organizing Committee (Kyoto University):
Takahiro Tanaka, Naoki Seto, Hiroyuki Nakano, Hiroyuki Kitamoto, Kei Yamada, Tomoya Kinugawa

Contact address:
Email: jgrg25[AT]

The 21st workshop on General Relativity and Gravitation in Japan (JGRG21)

Sakura Hall, Katahira Campus, Tohoku University
26-29 September 2011

There has been an impressive progress in astrophysical/cosmological observations in recent years. Cosmology has entered an era of precision science. Astrophysical black holes have been observed in many frequency bands with better resolutions and sensitivities. Observations of gamma-ray bursts have added a new mystery to relativistic astrophysics. And, a new frontier is waiting to be explored by gravitational wave interferometers. On the theoretical side, motivated by unified theories of fundamental interactions, especially string theory, many efforts have been made for studies of physics in 5-dimensional or higher dimensional spacetimes, and there is a growing interest in experimental verifications of extra dimensions. There have been also important and interesting developments in various other areas, including alternative theories of gravity, quantum gravity, and spacetime singularities, to mention a few. In this workshop, we plan to overview these recent developments and discuss future perspectives through invited and contributed presentations.


The 20th conference on general relativity and gravitation in Japan (JGRG20)

About JGRG20 conference

The 20th conference on general relativity and gravitation in Japan (JGRG20) will be held from September 21 to 25, 2010, at Yukawa Institute for Theoretical Physics, Kyoto University. The information is available at The webpage includes (partial) information of invited speakers and a link to register and submit a possible contributed presentation. The site will be updated shortly with the final list of speakers.

Takashi Nakamura and Kei-ichi Maeda, who have been the primary organizers of the JGRGs, will be 60 years old in September and October 2010, respectively. We are going to celebrate their 60th birthday in JGRG20.

Scientific Organizing Committee

Hideki Asada (Hirosaki University)
Takeshi Chiba (Nihon University)
Tomohiro Harada (Rikkyo University)
Kunihito Ioka, Hideo Kodama (KEK)
Hideki Ishihara, Ken’ichi Nakao (Osaka City University)
Yasufumi Kojima (Hiroshima University)
Kei-ichi Maeda, Shoichi Yamada (Waseda University)
Shinji Mukohyama (IPMU)
Takashi Nakamura, Naoki Seto, Tetsuya Shiromizu, Jiro Soda (Kyoto University)
Yasusada Nambu, Naoshi Sugiyama (Nagoya University)
Ken-ichi Oohara (Niigata University)
Misao Sasaki, Masaru Shibata, Takahiro Tanaka (YITP)
Masahide Yamaguchi (Aoyama Gakuin University)
Jun’ichi Yokoyama (RESCEU)

Local Organizing Committee (Kyoto University)

Masaru Shibata, Takashi Nakamura, Misao Sasaki, Takahiro Tanaka, Jiro Soda, Tetsuya Shiromizu, Naoki Seto, Kenta Kiuchi, Koutarou Kyutoku

Contact address

Email: jgrg20[AT]

19th workshop on General Relativity and Gravitation (JGRG19)

We are pleased to announce that the 19th workshop on General Relativity and Gravitation (JGRG19) will be held in Tokyo.
This is one of a series of JGRG workshops held in Japan every year since 1991, which has provided a place where people can exchange ideas and pursue future trends of research. The workshop will cover a wide area of research related to general relativity.
A tentative list of invited speakers is given below.

Martin Bojowald (Penn State, USA) [Quantum Gravity]
Ben Craps (Vrije Universiteit Brussel, Belgium)
[Cosmological Singularity Problem]
Scott Hughes (MIT, USA) [Gravitational Waves]
Pankaj Joshi (TIFR, India) [Black Holes]
Shunji Kitamoto (Rikkyo, Japan) [X-ray Astronomy]
Soebur Razzaque (Naval Research Lab., USA)
[High Energy Astrophysics]
Antonio Riotto (CERN, Switzerland) [Early Universe]

The registration is open at the conference web site. The deadline is the 2nd of October, 2009.

For further information, please visit our web site at

H. Asada, K. Ioka, T. Chiba, H. Ishihara, A. Hosoya,
H. Kodama, Y. Kojima, K. Maeda,
S. Mukohyama, T. Nakamura, K. Nakao, K. Oohara,
M. Sasaki, M. Shibata, T. Shiromizu, J. Soda,
N. Sugiyama, T. Tanaka, Y. Nambu, S. Yamada, J. Yokoyama

T. Harada, M. Saijo, N. Shibazaki

Inquiries to:
E-mail: (change ‘_AT_’ by @ )

Tomohiro Harada
Department of Physics, Rikkyo University,
Toshima, Tokyo 171-8501, Japan
Phone: +81 3 3985 2390
Fax: +81 3 3985 2412