Sanmu-shi, Chiba Prefecture, used to be a prosperous region based on its forestry industry and was widely known for its cedar trees branded as sanbu-sugi A combination of the aging labor population, the stagnant price of timber and the spread of disease that is typical to sanbu-sugi resulted in the devastation of the forests, which now requires immediate measures Now, neglect of thinner timber etc is remarkable in the forest in sanmu-shi Care of a forest is urged to such wood by finding out the utility value as firewood, and it tries to aim at reproduction of a forest as a result And event using the reproduced forest space aims at maintenance of a forest