In the graduate school, my research projects were the precise measurement of lifetimes of short-lifetime particles (charm and bottom particles) at FNAL (Femi National Accelerator Laboratory), USA, and e^+e^- collider experiment at TRISTAN, KEK (High Energy Accelerator Research Organization), Tsukuba, Japan. My current research projects are K2K (KEK-PS E362: Long Baseline Neutrino Oscillation Experiment from KEK to Kamioka) and Super-Kamiokande experiments. In addition, we are preparing for the JHF-nu Long-Baseline Neutrino-Oscillation Experiment at J-PARC (Long Baseline Neutrino Oscillation Experiment from Tokai to Kamioka) as a near future neutrino experiment. The neutrino is one of the most interesting objects to study not only in particle physics but also in astrophysics.

Main Publications

• ``Determination of Solar Neutrino Oscillation Parameters Using 1496 Days of Super-Kamiokande I Data,'' Super-Kamiokande Collaboration (S. Fukuda et al.) Phys.Lett.B539:179-187,2002
• ``Detection of Accelerator Produced Neutrinos at a Distance of 250km,'' K2K Collaboration(S.H. Ahn et al.) Phys.Lett.B511:178-184,2001
• ``Tau Neutrinos Favored Over Sterile Neutrinos in Atmospheric Muon Neutrino Oscillations,'' Super-Kamiokande Collaboration(S. Fukuda et al.) Phys.Rev.Lett.85:3999-4003,2000
• ``Design, construction, and operation of SciFi tracking detector for K2K experiment,'' A. Suzuki, H. Park et al. Nucl.Instrum.Meth.A453:165-176,2000
• ``Evidence for Oscillation of Atmospheric Neutrinos,'' Super-Kamiokande Collaboration(Y. Fukuda et al.) Phys.Rev.Lett.81:1562-1567,1998