Tomioka Silk Mill — UNESCO Industrial Heritage

Tomioka Silk Mill (富岡製糸場, Tomioka Seishijo) is a UNESCO World Heritage Site and Japan's first modern mechanized silk-reeling factory, established in 1872 during the Meiji era's industrialization drive. The mill was built with French technology and Japanese craftsmanship, producing high-quality silk thread that made Japan the world's largest silk exporter by 1900. The mill operated for 115 years (1872-1987), and its brick buildings, wooden-truss architecture, and intact machinery are preserved as a monument to Japan's transformation from feudal society to industrial power.

The site includes the East Cocoon Warehouse (300m long, brick structure housing silkworm cocoons), the Silk-Reeling Plant (original French-built machinery), and worker dormitories. Guided tours (in Japanese, English audio guides available) explain the silk production process — from silkworm cultivation to thread reeling — and the mill's role in women's industrial labor history (female workers lived on-site and learned modern factory skills).