The existing walls of the historical building "Kurohane Clinic" (1912) were examined with the X-ray non-destructive investigation. The investigation was to confirm the way was constructed, such as the structural members, the rot of materials and the condition of the wall sheathing. It was not possible to confirm them with inspection. It would be historical buildings. As the result of the investigation, there are no bracings found. Also it is clear that the two methods were used for the wall sheathing, one is the wood lath is laid across the studs 45degree in "Okabe" and the other is the "Takekomai-sitazi" in "Shinkabe". However, the rotten members have not been found.
