Reactor measurement of \theta_{12}; Secret of the power
  We demonstrate enormous power of dedicated reactor experiment for \theta_{12} with a detector placed at around the first oscillation maximum, which we call "SADO". It allows determination of sin^2\theta_{12} to the accuracy of \simeq 2% at 1 \sigma CL, which surpasses all the method so far proposed. Unlike reactor \theta_{13} experiments, the requirement for the systematic error is very mild, \simeq 4%, which makes it an even more feasible experiment. If we place a detector at \sim 60 km away from the Kashiwazaki-Kariwa nuclear power plant, 0.5 kt yr exposure of SADO is equivalent to \sim 100 kt yr exposure of KamLAND assuming the same systematic error. 
H. Minakata, H. Nunokawa, W. J. C. Teves, R. Zukanovich Funchal