Nishio is a relatively safe location in Japan for solo female travelers. Like most places in Japan, crime rates are generally low and the local residents are known for their politeness and respect. Despite the cultural differences, many people are willing to help in case of difficulties. Public transportation is reliable and safe to use, even during night hours. However, as always, it's recommended for everyone, not just solo female travelers, to be cautious, especially during night time in areas that aren't crowded.