About JGRG

Ever since Einstein had proposed general relativity in 1915, a lot of effort was put into research on spacetime and gravity. But for the initial half century it was largely done from a mathematical or purely theoretical point of view. The situation changed drastically after the discovery of 3K cosmic microwave background radiation in 1964 and of a pulsar in 1967. After these discoveries, the importance of general relativity in the study of astrophysics was widely recognized, and research in the areas of cosmology, relativistic astrophysics, and gravity had bloomed. In Japan the workshops on `General Relativity and Gravitation' were organized and held from 1974 for three years, which played the central role in expanding research in these areas. However, as each sub-field in astrophysics began to have its own developments, workshops on more focused areas and specific topics took over the GRG workshops.

A new turning point came in late 1980's. The idea to build large-scale interferometers for direct detection of gravitational waves became more realistic, and research on gravitation itself started to attract attention again. In Japan, a program supported by a grant-in-aid for scientific research on priority areas, ``gravitational wave astronomy", had started, which later developed into the TAMA project. Simultaneously with this movement toward research on gravitational waves, the importance of research in gravitational physics in general was recognized from new perspectives; from precision observation of relativistic objects such as black holes and neutron stars, and from progress in numerical relativity, theoretical cosmology, and particle astrophysics. This trend motivated several members of the above-mentioned program to start a renewed series of workshops on general relativity and gravitation. The first JGRG workshop (JGRG1) was then held at Tokyo Metropolitan University, from 4 to 6 December, 1991. There were about 120 participants in this workshop, indicating that there was indeed a high need for such a workshop from the community already at that time. Since then workshops of similar size have been held annually at different universities in turn. From JGRG10, held at Osaka University in 2000, we began to invite a few speakers from abroad and designated English as the language to be used in presentations.

The JGRG workshop series have been supported by active involvement of young postdocs and graduate students. In turn, it is hoped that their experience from the JGRG workshop series will help them grow into world's leading scientists.

The proceedings of the JGRG workshops have been published as printed volumes. From now on, to enable interested readers to have easier access, the proceedings will be published as electronic media. The website for the online proceedings will be managed by Theoretical Astrophysics Group, Department of Physics, Kyoto University.
(by Kei-ichi Maeda and Misao Sasaki, April 2009)

Link to Internaitonal Society of GRG(ISGRG)
(JGRG is not directly related to ISGRG)