  In this talk, we show the physics impacts of putting a large Water Cerenkov
detector in Korea during the T2K experimental period. The T2K experiment which
will start in 2009 plans to use the high intensity conventional neutrino beam
from J-PARC at Tokai village, Japan. The center of this beam will reach the sea
level between Japan and Korea, and an off-axis beam at 0.5^o to 1.0^o can be
observed in Korea. For a combination of the 3^o off-axis beam at SK with
baseline length L=295km and the 0.5^o off-axis beam in the east coast of Korea,
near Gyeongju, at L=1000km, we find that the neutrino mass hierarchy (the sign
of the larger mass-squared difference) can be resolved and the CP phase of the
MNS unitary matrix can be constrained uniquely at 3-sigma level when
sin^2(2theta_rct) simgt 0.06.
