Revival

Revival (再上映 (リバイバル), Ribaiburu, lit. "Rerun") is an involuntary special phenomenon exclusive to Satoru that allows him to jump back in time in order to rescue someone from a fatal encounter within his proximity.

Overview
Satoru begins to feel a discomfort, before being brought back in time by a few seconds prior to a forthcoming incident. This allows him to seek out the source of discomfort and remove it in order to prevent further complications. However, this solely relies on his experience, as the cause is often oblivious. The event often enables him to prevent people's deaths, hence the term "Revival". Empirically, Satoru's capable on responding to Revival, as it occurs involuntary and often at random times. Fujinuma described his experience as a deja vu. After discovering his mother's death, Satoru persistently attempted to turn back time, which triggers a large-scale Revival, bringing him back 18 years in the past.