Gunma · Permanent cultural facility

Tomioka Silk Mill

Explore the machinery-led silk industry that helped modernize Japan, with historic silk-reeling buildings and timber-framed brick cocoon warehouses.

What to see

Historic industrial buildings including cocoon warehouses and the silk-reeling hall
The history of silk production and modernization

JR Takasaki Station → your visit

Transfer to Joshin Railway and travel to Joshu-Tomioka Station.
Walk about 15 minutes to the mill.

Official access information ↗

Closures & important conditions

29–31 December, with possible temporary closures for inspections or work.

Closure information reviewed: 2026-11-06. Check last-minute changes.

Plan your visit

Checked: 2026-10-31 · a facility guide, not a dated festival listing

Hours & admission arrangements

09:00–17:00; last admission 16:30.

Individuals do not need reservations. Groups of 20 or more must book. Check guided-tour arrangements separately.

What still needs checking

Guided-tour operation and availability on the visit date
Accessible buildings and restoration works
Activities running on the visit date

Official sources & photographs

Access to individual areas, exhibits and activities can vary by day.

Photo pending · View official photos ↗

Official visitor information ↗

Same prefecture · Gunma
Usui Pass Railway Heritage Park
Culture & places
Opening & visit notes
- Closed Tuesdays except in August. A holiday Tuesday opens, with the next weekday closed. New Year closure is 29 December–4 January. The official monthly calendar also confirms continuous closure from 29 December 2026 through 5 January 2027.
- For 23 February 2027, a holiday Tuesday, the regular holiday-opening rule conflicts with the current monthly calendar’s closure marking. Confirm opening on 23–24 February directly with the park.
- The trolley normally runs on weekends/public holidays in March–November and during August’s Obon period. Its regular December–February suspension does not mean the whole park closes for winter.
- Much of the collection is outdoors. Bring winter layers and suitable shoes, and check official notices for weather or maintenance changes to rides.
Same prefecture · Gunma
Gunma Museum of Natural History
Culture & places
Opening & visit notes
- Normally closed Mondays, or the following day when Monday is a public holiday. The official October 2026–March 2027 calendar also marks December 14, 2026–January 1, 2027, January 4–8 and February 15–19 closed. January 2–3 are marked open. Holiday substitutes are November 24 and January 12; November 23, January 11 and March 22 are marked open.
- Check winter dates carefully: the long closure begins in mid-December 2026.
- The official calendar opens Monday, March 22, 2027 (substitute holiday) and closes Tuesday, March 23.
Same region · Tochigi
Ashio Copper Mine
Culture & places
Opening & visit notes
- Open daily through 30 November 2026. From December: closed Thursdays in December–February, except public holidays, and 31 December–2 January. March–November normally closes on the second Thursday, moving to the fourth in August or when the second Thursday is a holiday. Confirmed winter closures: 3/10/17/24/31 December; 1/2/7/14/21/28 January 2027; 4/18/25 February; 11 March. Open 11 February.
- Since 2 September 2026, demolition work has moved ticket sales to Fureai-kan and changed the entry/exit route. No end date was verified.
- The visit includes walking in a dim mine tunnel. Wear suitable shoes and watch your footing. Pets are not admitted.
Same region · Ibaraki
Nikko Memorial Museum
Culture & places
Opening & visit notes
- Closed Mondays, public holidays and New Year. A holiday Monday remains closed; no following-day substitute rule is stated. The official calendar marks 27 December 2026–4 January 2027 closed, also 11 January, 11 and 23 February, and 22 March 2027.
- The winding-engine room has been unavailable since 13 August 2026 following typhoon damage; no reopening date is announced.
- Construction of an accessible toilet is scheduled to restrict the electric locomotive, former Kuhara headquarters and Jingai-do from 17 August through 13 November 2026. Dates may change, so confirm reopening before visiting. The main building and Mining Museum remain available during these works.

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Tomioka Silk Mill

What to see

JR Takasaki Station → your visit

Closures & important conditions

Plan your visit

More from this area

Usui Pass Railway Heritage Park

Gunma Museum of Natural History

Ashio Copper Mine

Nikko Memorial Museum