We examined the cooperation organization of a sawmill company in local area using IT on the purposes of spreading Larch which is a typical tree of Hokkaido as building lumber. Specifically, we developed the order receiving system by which sawmill company can share about sawmilling and drying, furthermore, about the order receiving information from a construction company by cooperating with other companies in local area.

　And we examined the traceability system of wood which can identify wood (by IC tag etc.) in the stage until a house is made from production, when a sawmill company cooperates with a forestry association and a construction company in local area.