The Tomioka Silk Mill and Related Industrial Heritage (富岡製糸場と絹産業遺産群, Tomioka seishijō to kinu sangyōisangun) is a group of places connected to Japan's industrial growth during the Meiji period. This group is part of Japan's industrial history. The Tomioka silk mill was built in 1872 in Gunma Prefecture, which became an important center for raising silkworms and producing raw silk. In 2007, these sites were submitted together for inclusion on the UNESCO World Heritage List under criteria ii, iv, and v. Ten different sites were proposed (listed below). In 2014, four of these sites were kept as part of the Tomioka Silk Mill and Related Sites.