[en] This paper summarizes the progress and operation of J-PARC accelerators. The linac beam current was upgraded from 30 to 50 mA by replacing a new ion source and a radio frequency quadrupole linac. At the 3 GeV synchrotron, injection bump magnet power supply system was modified and the bump orbit was stabilized. A high power beam of 8.41x10"1"3 protons per pulse was demonstrated at 3 GeV, which was equivalent to 1 MW if the repetition would be 25 Hz. Beam power at the Materials and Life science experimental Facility (MLF) for user operation was increased from 300 to 500 kW after the linac beam current upgrade. At the main ring, beam loss was reduced by suppression of transverse instabilities and so on. The beam power for the neutrino experiment was increased from 260 to 320 kW in February, and recorded up to 360 kW in May. The total number of protons on the neutrino facility target exceeded 1x10"2"1 on March 26. Operation of the hadron experimental facility had been suspended since the accident in May of 2013. The countermeasures had been taken and user operation was resumed in this April. (author)