Kashima is extremely safe for solo female travelers. The crime rates are very low, with petty crime being unusual, and violent crime even more so. The locals are generally friendly and respectful, and many can communicate in English, making it easy to ask for help if needed. Public transport is reliable, well maintained, and the city is highly pedestrian-friendly. As always, standard precautions should still be taken, such as not walking alone at night in less crowded areas, but overall, you can feel secure while exploring Kashima.