In the city, there has been a string of grate thefts: 25 pieces in six cases in fiscal 2022, 40 grates on 25 occasions in fiscal 2023, and 23 in 11 cases as of the end of June this fiscal year. Without covers, vehicles and pedestrians are at risk of falling into the gutters, so measures to prevent theft were urgently needed. One method to prevent theft is to use metal fittings to fix grates in place, but this is both costly and difficult to maintain. Therefore, the city decided to mark grates with spray paint, which is less costly and easier to manage. The markings depict a design of a strawberry, of which the city is the largest producer in Japan.