A group of relatives of victims who died or went missing in the 2014 eruption of Mount Ontake plans to sue the central and prefectural governments for failing to alert hikers properly, the families said Tuesday.

The families of five victims will demand ¥150 million in damages, arguing that the Meteorological Agency should have raised the alert level before the deadly eruption and that the Nagano Prefectural Government had failed to repair broken seismographs in the area.

The eruption late on the morning of Sept. 27, 2014, on a volcano popular with hikers and tourists, particularly during the autumn foliage season, killed 58 people. Five others who were missing are presumed dead. Many deaths resulted from the impact of falling rocks.