Future atmospheric neutrino data from Super-Kamiokande

Expected sensitivity of future atmospheric neutrino data from Super-Kamioka nde on neutrino oscillation physics is discussed. We expect that the accura cy of the sin(2)2 theta (23) measurement will be improved with (exposure ti me)(1/2) By analyzing high energy fully contained events, it could be possi ble to statistically demonstrate the existence of charged current nu (tau) interactions at the 3 standard deviation level with a few more years of dat a. Subdominant nu (mu) --> nu (e) oscillations could be observed if theta ( 13) is near the present limit. However, significantly more data will be req uired to observe a 3 standard deviation effect.