OUSEI KANKYO SHOJI Co., Ltd., we carry out environmentally friendly processing by making use of recycling technology and smelting know-how for recycling materials. Furthermore, we are promoting the development and utilization of urban mines in order to create a sustainable recycling system by creating resources.
"Urban Mining" is a recycling concept proposed in 1988 by Professor Michio Nanjo of Tohoku Ore Dressing and Smelting Research Institute. It is a concept that treats the factory products accumulated above ground as resources, named them " Urban Mining ", and attempts to actively extract resources from them.
In recent years, due to soaring prices of precious metals and rare metals in the industrial world, measures are being taken to recover scarce resources (precious metals, etc.) from discarded mobile phones, smartphones, and computer parts, and the concept of urban mines has been re-evaluated.
Japan is said to have the world's top-level urban mines and is said to be on a scale comparable to resource-rich countries.
Mobile phones and smartphones are often replaced every few years, and when they are no longer in use, they tend to be stored somewhere in the house. However, some circuit boards (called "urban ore" in contrast to urban mines) in electronic devices contain rare and valuable metals including rare metals and rare earth elements.