Asago, in Japan, is very safe for solo female travelers. Like most of Japan, it boasts low crime rates and boasts a reliable public transport system that is easy to navigate. The locals are also well-known for their politeness and helpful attitudes towards visitors. However, it's still important to keep your usual travel safety precautions in mind, such as not leaving your belongings unattended and knowing the address and contact details of the place where you're staying.