Super-Kamiokande atmospheric neutrino results and long baseline experiments in Japan

Atmospheric neutrino data from Super-Kamiokande are used to study neutrino oscillations. Data are explained well by two flavor νμ→ντ oscillations. Recent L/E analysis has shown that the νμ disappearance probability obeys the sinusoidal function as predicted by neutrino oscillations. K2K, a long baseline neutrino oscillation experiment between KEK and Super-Kamiokande, has significantly improved the statistics of the data. The results from K2K are in good agreement with those from atmospheric neutrino experiments. T2K, a future neutrino oscillation experiment between J-PARC and Super-Kamiokande, is also discussed.