Toilet with attached treatment unit is attracting attention as an environmentally friendly, resource-recycling solution that can be used in natural areas where there is no place to safely discharge of waste. Such toilets have already been put into successful practical use in mountain areas, riverbeds, event venues, construction sites, and other places where the existing infrastructure cannot be relied upon. Despite the positive points, there have been several cases where the toilets have malfunctioned due to conditions of excessive usage or insufficient maintenance. This paper summarizes the disposal technology and other features of the toilet with attached treatment unit, introduces installation cases that have till now been undertaken, and outlines evaluations and issues that have arisen during the process of publicly demonstrating this technology. One further point to note is that this technology is attracting attention as an effective means for the alleviation of poor toilet conditions at evacuation shelters in disaster-stricken areas and natural disaster sites. The paper also outlines matters necessary for best utilizing these technologies in various places along with the challenges for establishing them as a new means of social infrastructure with a future outlook.