Tomioka Silk Mill

Listen for a moment. Gravel shifts under your shoes, and somewhere a pigeon settles on a tiled roof. In front of you is a long wall of warm red brick, crossed by dark timber beams. The brick is laid in a pattern of long and short faces. It looks almost woven. That is fitting, because this place was built for thread.

One small correction first. This guide is filed under Takasaki, but the mill stands in the neighbouring town of Tomioka. Many visitors come out from Takasaki on the small local railway line. So if the trip felt longer than you expected, you are not lost. You are exactly where Japan's modern silk industry began.

The mill opened in 1872. Japan had only recently ended two centuries of near isolation. The new Meiji government wanted to modernise quickly, and silk was the country's most valuable export. But much of the silk reeled by hand in farmhouses was uneven in quality. Foreign buyers complained. The government decided to build a model factory, a working example that would show the whole country how silk should be made.

To design it, they hired a Frenchman named Paul Brunat. He had experience in the silk trade, and France at that time was a leading centre of silk weaving. Brunat chose the site, ordered French reeling machines, and brought French engineers and instructors. Tomioka had useful things nearby. There was water, there was land, and there was coal from the region. Silkworm farming was also already part of rural life across the Gunma area.

Now look closely at those walls again. This style is often called timber-framed brick. The structure is a frame of heavy wooden posts and beams, in the Japanese tradition. The spaces between the timbers are then filled with brick, in the European tradition. Local tile makers fired the bricks, which was new work for them. The roofs carry Japanese clay tiles. So each building is a meeting of two building cultures in one wall.

The two long buildings on either side of the courtyard are the East and West Cocoon Warehouses. Here is a detail many visitors miss. The upper floors were the important part. Cocoons were stored up there, where air could move around them and keep them dry. Silkworms produce cocoons in a short season, so the mill needed huge storage to keep working through the year.

Walk on to the Silk Reeling Plant. It is a single long hall, well over one hundred metres from end to end. Step inside and look up. The roof is held by a timber truss, a triangle-shaped frame that spans the room without columns in the middle. That left one wide, open floor for rows of machines. Along the top runs a raised section of windows. In the years before electric lighting, daylight was everything. Workers needed clear light to see a thread finer than a hair.

The machines you see in the hall today are not the original French ones. They are automatic reeling machines from the later twentieth century. That surprises many people. This was not a museum frozen in the 1870s. The mill kept working, and kept updating, for more than a hundred years. It was privatised in 1893, passed through several companies, and only closed in 1987.

Now, the people. The first workers were young women, recruited from across Japan. They were meant to learn the new methods here, then return home and teach others. At first, recruitment was hard. According to a popular story, a rumour spread that the French foreigners drank blood. The red liquid people had seen was almost certainly wine. Whether or not the tale is exact, it shows how strange this place felt to rural families at the time.

One of those young women, Wada Ei, later wrote a memoir about her time at the mill. Her account is one of the reasons we know about daily life here. It describes training, pride in the work, and the feeling of being part of something new. Historians often note that early conditions at Tomioka were relatively good for the era. Hours were set, and there was time for rest. Later private factories elsewhere in Japan were often far harsher.

Find the Brunat House as you walk around the grounds. It was built as the home of the French director and his family. It has wide verandas on the outside, a style suited to Japan's hot, humid summers. Think about it for a moment. A family from France lived here, beside rice fields and mulberry trees, in a country that was changing fast around them.

In 2014 the mill and several related silk sites nearby were added to the UNESCO World Heritage list. The listing recognises how this place helped spread silk technology across Japan. In turn, Japanese raw silk became cheaper and more widely available around the world. In the same year, the reeling plant and the two cocoon warehouses were named National Treasures of Japan. That is the country's highest level of protection for a building.

Preservation work continues here, and some areas may be covered or closed while craftspeople repair them. That is part of the story too. Old timber, brick and clay tile all need care to survive. If you see scaffolding or a protective shell, look for any panels that explain the repairs. Sometimes you can watch the slow, careful work as it happens.

Before you leave, stand once more in the courtyard. Turn slowly. Red brick, grey tile, dark wood, and the quiet streets of a small town beyond the gate. For more than a century, this courtyard was full of people, steam and the steady sound of machines. Now it is calm. As you walk back towards the station, look at the old shopfronts and houses. Some of them grew up because this mill was here.