Yamagata poses minimal safety concerns for a solo female traveler. It's a city known for its orderliness, respect for others, and low crime rate. Japanese culture emphasizes respect and politeness, and this carries over into behaviors creating a safe environment. The city is well-lit at night and public transportation is reliable. Locals are friendly and helpful, which strengthens the comfortable and secure ambiance. However, as always, it's important to have common sense and take standard safety precautions, like avoiding deserted areas at night.