Summary of Changes (Page and line number is based on resubmittal version of our manuscript) Page 1, line 6 in abstract: change; "for sin^2 2th_mue > 0.15" ---> "for the effective mixing angle in 2-flavor approximation of sin^2 2th_mue (~= 1/2 sin^2 2 th_13) > 0.15" Page 2, line 7-17: Added sentences and equations to explain the relation between our notation, theta_mue, and the mixing parameters in 3-flavor formalism. Page 2, Fig.1 caption: change; "(sin^2 2theta,Delta m^2)" ---> "(sin^2 2theta_mumu,Delta m^2_mumu)" Page 2, Table 1 caption: change; "(sin^2 2theta,Delta m^2)" ---> "(sin^2 2theta_mue,Delta m^2_mue)" Page 3, line 11: change; "(sin^2 2theta,Delta m^2)" ---> "(sin^2 2theta_mumu,Delta m^2_mumu)" ,and added the brief explanation of theta_mumu; "where theta_mumu is the effective mixing angle in 2-flavor approximation for nu_mu -> nu_x oscillation" Page 4, line 51: Move equation of the probability of nue appearance to Page 2. Page 4, Equation 4: Remove unnecessary parentases; "sin^2 (2 theta_mumu) ---> "sin^2 2 theta_mumu" Page 4, Fig 2: add a curve of 90% CL sensitivity, and remove 99% CL limit. Page 4, Fig 2 caption: Remove description for 99% CL limit, and add description for 90% CL sensitivity. Page 5, line 3: Add description for 90% CL sensitivity; "The sensitivity of the experiment for the current statistics is also shown in Fig.2"