"Toilet Diagnostician" was introduced by Amenity Co., Ltd., and was certified in 2003 by the Ministry of Health, Labor and Welfare's in-house certification system. Toilet professionals who surpassed the academic and practical exams. Their basic idea is not only to solve toilet troubles superficially, but also to prevent possible troubles and to maintain and manage toilets efficiently and hygienically. If necessary, they will suggest solutions and maintenance methods.
We have learned the specific cleaning criteria from the "toilet physician" for cleaning decisions that depended on the senses such as appearance and smell, and are working to further raise the level of all staff.

The diagnosis is very strict, starting with the odor and performing a comprehensive diagnosis of the toilet, not just the appearance of dirt, such as ventilation, illuminance, humidity, and discomfort index, and the results are shown numerically. Once a year, it is conducted at all SAs and PAs in NEXCO CENTRAL. Improvements are made at the same time by suggesting points for improvement, which keeps us comfortable and clean.