Yokosuka, Japan

With a population of 418,325, Yokosuka is no quaint countryside retreat. As the home of a major U.S. naval base, this bustling industrial hub has a distinct American influence, from the shops accepting U.S. dollars to the anti-war protests that once roiled the streets. However, the city's location at the entrance to Tokyo Bay also makes it vulnerable - residents regularly participate in nuclear evacuation drills, and two new coal plants are being built despite the climate emergency. For those drawn to the nexus of military and civilian life, Yokosuka may be an intriguing option, but the ever-present bureaucratic headaches and environmental concerns are not to be taken lightly.