The surfaces of wood materials are disintegrated not only by sunlight and rainwater but also by microbes when exposed above ground condition. This paper deals with the investigation of fungi isolated from the surfaces of Sugi heartwood lumbers (W100 by T10 by L300 mm) exposed at an angle of 45° without ground contact for 16 months at the six test sites from northern to southern regions of Japan. The parasites were collected from the surface using the Sellotape. Isolation medium used was PDA including 100 ppm tetracycline-hydrochloride to suppress the growth of bacteria. Identifications were microscopically conducted using a slide culture technique. Dominant genera isolated were Aureobasidium and Nigrospora regardless of the test site as well as climatic condition.

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