  New generation of three reactor neutrino experiments have made definitive
measurements of the smallest neutrino mixing angle theta13 in 2012, based on
the disappearance of electron antineutrinos. More precise measurements of the
mixing angle have been made as well as the squared mass difference between
electron neutrinos. A rather large value of theta13 has opened a new window to
find the CP violation phase and to determine the neutrino mass hierarchy.
Future reactor experiments, JUNO and RENO50, are proposed to determine the
neutrino mass hierarchy and to make highly precise measurements of theta12, the
squared mass difference between neutrino masses 2 and 1, and the squared mass
difference between electron neutrinos.
