The series of earthquakes that has hit central Kyushu since April 14 pose a variety of problems for us. The Meteorological Agency has explained that this chain of temblors is unprecedented in that the location of the hypocenter has moved. But one has to realize that it was only recently in the long history of the Earth that humans began their observations of seismic activities — and that it should come as no surprise if such a pattern of earthquakes had happened frequently in the past. In short, we humans know very little about the movements of the Earth. In Japan, earthquakes can hit anytime and anywhere.

Serious questions have been raised about the Abe administration's response to the Kumamoto quakes. The first is why it didn't try to listen to people who were suffering from the devastation brought by the temblors. The government's call on evacuees to take shelter indoors following the initial quake that hit on April 14 drew the ire of the Kumamoto governor, who felt that officials in Tokyo didn't understand the feelings of local residents.

The second question deals with the administration's policy on the operation of nuclear power plants following the quakes. The government has declared that it won't shut down the reactors at Kyushu Electric Power Co.'s Sendai plant in Kagoshima Prefecture — currently the sole nuclear plant in operation in this country. After clearing the Nuclear Regulation Authority's screening of the plant for a restart, Kyushu Electric scrapped its plan to build a new facility with a seismically isolated structure that would serve as a command center in the event of an emergency. One of the assumptions in judging the safety of restarting the Sendai plant was that people would be able to evacuate the area by using bullet trains and the expressway network in case of a nuclear crisis. The Kumamoto quakes knocked those transportation means out of service, raising doubts about the workability of the evacuation scenario. That alone should be reason enough to halt the Sendai plant and rethink the safety measures. We need to consider carefully whether it is wise to have so many nuclear plants in this quake-prone country.