One Will started off as a supplier of imported houses with a vision to "provide houses that are cool in summer, warm in winter, and healthy". The trigger to start develop this original natural wall material was an incident back in 1993. They noticed the unnatural smell emitted from the plastic walls of constructed houses, and with faith to their vision, baked out the harmful substances and built in extra ventilation to prevent health problems of customers. Sick-house syndrome is a set of symptoms such as headaches, throat ache and eventually weakened immune systems, resulted from exposure to indoor pollutants – an issue not yet acknowledged at the time.

Since then One Will started to seek a 100% natural, healthy wall material and comes across diatomaceous earth. This natural material consists of numerous sponge-like holes that "breathes" – absorbs and exhales large amount of moisture, keeping the indoor air at a moderate humidity. Noticing its ability to breathe in harmful substances, One Will succeeded to create a wall material that neutralize and literally absorb the acid substances by using alkaline lime paste to solidify the earth materials. The company has done further R&D in partnership with Kanagawa Pref. to improve the effect dramatically.