The world is now in the throes of fighting Covid-19 infections. The fight between humankind and an invisible enemy seems like something happening in the world of sci-fi, but it is a reality. March, this year, marks the 10th year since the catastrophe of the Great East Japan Earthquake. In addition to the disaster of the earthquake and tsunami, there was an accident at the Fukushima nuclear power plant, and the whole area was affected by unseen radioactive contamination. Unable to return to their homes because of concerns about contamination, many people are still fighting an invisible enemy. While this fight against an invisible enemy continues, an argument about whether the Tokyo Olympics should be held or not has begun. There are various views concerning how Covid-19 will be resolved at a global level. Even if the situation calms down, many people say that just as those evacuated after the nuclear accident cannot return home, we cannot go back to our pre-corona lives. In Japan, after being defeated in WWII, people’ s values and lifestyles changed drastically. The post war period is perceived as being a new era and subsequent events are often referred to as “the biggest in the post war years,” and “after the war...” Covid-19 might not be completely eradicated. Just as with the start of the post war period, a new corona era in which we must learn to live with the virus may have already begun. Some predict that a host of invisible enemies, including ever evolving viruses, radioactivity and abnormal weather, will someday wipe out humankind.