There was no maintenance standard for interior finish of station in Japan. Therefore, Asano Taiseikiso engineering made the standards with Tokyo Metro or other 7 railway companies in accordance with situations of each company, and carry out inspection, soundness diagnosis and repair work. The paper describes development of new inspection methods for interior finish in stations, results of inspections and analysis of them.

In traditional inspection procedures of a certain railway company，only a visual inspection was applied. However, as a result allowed a high number falling object incidents to occur.

Therefore, inspection procedures were improved for introducing new inspection procedures with introduceing contact check, prodding test for ceilings, hammering test, pulling test for walls, shaking test, stepping test for floor, etc. Due to the improvement of inspection procedures, the number of falling object accidents in a certain railway company has steadily decreased.