factory has been designated as an "attachment" of the important cultural property designation. This building is a wooden one-story building. See also Wada Ei List of World Heritage Sites in Japan List of Historic Sites of Japan (Gunma) References External links Tomioka Silk Mill World Heritage Promotion Homepage Textile companies of Japan Japanese companies established in 1872 Silk mills World Heritage Sites in Japan 1987 disestablishments in Japan Buildings and structures in Gunma Prefecture Historic Sites of Japan Important Cultural Properties of Japan National Treasures of Japan Tomioka, Gunma