The 25th anniversary of the discovery of significant neutron halo takes place this year. As a celebration of this occasion, the Halo2010 Symposium will be held on the 6th-9th of December, 2010 by the Center for Nuclear Study (CNS), the University of Tokyo. The venue is Shonan Village Center near Tokyo, Japan. The remarkable neutron-halo effect in 11Li was observed in the first measurement of the nuclear radii of light neutron-rich nuclei by means of secondary beams produced by projectile fragmentation of a high-energy heavy-ion beam. It has opened a new era of the study of nuclei far from the stability. This experiment was performed in Berkeley under the US-Japan collaboration conducted by the Institute of Nuclear Study, the University of Tokyo. The INS has been transformed, and the relevant part has become the CNS. The Halo2010 Symposium is devoted to review various experimental and theoretical progresses in the fields of physics of drip-line nuclei and to discuss future perspectives initiated by 3rd generation RI beam facilities. Topics: Nuclear Radii / Charge Radii Mass Measurements Nuclear Moments Momentum Distribution Beta Decay Charge Exchange Reactions Electro-Magnetic Responses Spectroscopy of Loosely-Bound and/or Unbound System Di-Neutron Correlation / Few Neutron System / Neutron Matter Interaction and Structure in Dripline Nuclei Reaction Mechanism for Dripline Nuclei Neutron-Rich Hypernuclei Registration to the symposium is open to anyone who is interested in attending. Local Organizer: S. Shimoura (Chair), H. Hamagaki (CNS), T. Nakatsukasa (RNC), T. Otsuka (Tokyo/CNS), H. Sakurai (RNC), S. Michimasa (CNS, Secretary) Advisory Committee: T. Aumann (GSI), K. Ikeda (RCNP), T. Kobayashi (Tohoku), K. Matsuta (Osaka), W. Mittig (MSU), T. Nakamura (TITech), N. Orr (Caen), A. Ozawa (Tsukuba), B.M. Sherrill (MSU), T. Suzuki (Saitama), Y. Suzuki (Niigata), T.J.M. Symons (LBNL), I. Tanihata (RCNP).