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The IceCube Neutrino Telescope, a huge Neutrino Telescope with 1 cubic km instrumented volume, starts construction in 2004. The project status and the expected sensitivity and performance for detecting high energy cosmic neutrinos are reported. Preliminary results based on AMANDA experience without taking into account IceCube's new digital technology indicate a sensitivity to a diffuse muon neutrino energy flux of 10^-8 GeV/cm² sr sec. Proposed models for GRB emission should be observable in less than one year. The capability of EHE neutrino detection is also briefly mentioned.

The NSF has made investments in searches for dark matter, in ultrahigh energy cosmic rays and gamma rays, in neutrino physics and astrophysics, and in nuclear astrophysics. We expect the future to witness the expansion of these efforts, along with efforts to refine the measurements of the cosmic microwave background. In some of these efforts the Deep Underground Science and Engineering Laboratory is expected to play a major role.

The NSF has made investments in searches for dark matter, in ultrahigh energy cosmic rays and gamma rays, in neutrino physics and astrophysics, and in nuclear astrophysics. We expect the future to witness the expansion of these efforts, along with efforts to refine the measurements of the cosmic microwave background. In some of these efforts the Deep Underground Science and Engineering Laboratory is expected to play a major role.

Cosmic gamma ray is a powerful probe for high energy phenomena in the Universe since it is produced by interactions of high-energy particles or decays of massive particles. New gamma-ray observatories such as Fermi satellite and several ground-based Čerenkov telescopes started operations in the past 10 years and revealed thousands of celestial gamma-ray sources. I will present the recent results on explorations of origins of cosmic rays, acceleration and radiation processes at extreme astrophysical conditions in relativistic jets from black holes, and annihilations of WIMP dark matters via observations of cosmic gamma rays.

Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) currently undertakes two large-scale projects in cosmology and particle astrophysics. One is Subaru Measurement of Images and Redshifts, the Sumire project. It observes images and redshifts of the galaxies using Subaru telescope to study cosmology and astronomy. The other is XMASS experiment aiming to detect the cold dark matter using liquid Xenon. We provide a brief introductory description of these projects.