The Shield Tunnelling Association of Japan (STA) was established in 1999 by bringing together individual associations and research groups related to shield tunnelling methods, and currently supports 14 different methods. Since its establishment, STA has been introducing each method to engineers involved in shield tunnelling.
Shield tunnelling has accumulated a strong track record as a safe construction technique for urban tunnels. STA focuses on activities such as providing information on the 14 methods and establishing a database of shield construction achievements.Through these efforts, STA aims to be an association that contributes to society.