Ashio Copper Mine Tour: Explore Japan’s Industrial History in Nikkō
Ashio Copper Mine (Ashio Dōzan), in the Ashio area of Nikkō, Tochigi Prefecture, produced copper for many years until its closure in 1973 (Shōwa 48).
Today, part of the mine is open through the Ashio Copper Mine visitor attraction (Ashio Dōzan Kankō), where you ride a mine train into the tunnels and walk through underground spaces to discover the work and technology behind copper production.
The attraction offers several perspectives on the mine’s history, from recreated underground scenes and exhibits at the Copper Museum (Akagane Shiryōkan) and mint (Chūsenza) to the Ashio mine pollution incident and revegetation efforts explored through resources in the surrounding area.
Ashio Copper Mine History: From an Edo Shogunate Mine to Modern Industry
Full-scale operations at Ashio Copper Mine began in 1610 (Keichō 15), centered on Mount Bizen-Tateyama.
During the Edo period, development proceeded under the shogunate’s direct control, and Ashio copper was used in buildings such as Nikkō Tōshō-gū Shrine and Edo Castle, as well as exported to the Netherlands and China.
In the Meiji period, mining entrepreneur Ichibē Furukawa, who took over management in 1877 (Meiji 10), introduced new mining, smelting, and transport technologies, developing the mine into a contributor to Japan’s modernization.
In the modern era it became Japan’s largest copper mine by output, growing to supply around one-quarter of the country’s copper production in the early 20th century.
Knowing this background before viewing the underground exhibits helps connect changes in tools and working methods with wider changes in society.
Visit Mine Tunnels Opened to Sightseers After Closure
The attraction uses former mine tunnels and opened in 1980 (Shōwa 55), 7 years after the mine closed.
The Tsūdō Tunnel used by the facility was one of the mine’s main tunnels and was designated part of the national historic site Ashio Copper Mine Remains in 2008 (Heisei 20).
Excavated over about 400 years, Ashio’s tunnels total 1,234 km in length, a distance sometimes compared to traveling from Tokyo to Hakata.
The surviving tunnels and recreated exhibits help you imagine the conditions in which people once worked.
When researching your destination, use the facility name Ashio Dōzan Kankō to distinguish it from nearby historic sites and other exhibition facilities.
Inside Ashio Copper Mine: A Tour Beginning with a Mine Train Ride
A visit begins with a mine train ride into the tunnels, followed by a walk through the exhibits after you get off.
The first train departs at 9:00 a.m., with departures about every 10 minutes except during busy periods, and the last train leaves at 4:15 p.m.
Since the visit involves both riding and walking, plan for your companions’ walking needs.
A One-Way Mine Train Ride Followed by About 300 m of Walking
The mine train runs one way into the mine, rather than carrying you throughout the entire visit.
You get off about 150 m into the tunnel, then walk approximately 300 m through the exhibits.
The walking route includes the Copper Museum and is said to continue to the mint near the end, so allow time in your itinerary for the recreated mining scenes and museum exhibits.
From Edo to Shōwa: Notice the Figures’ Tools and Working Positions
Inside the mine, figures recreate ore-extraction work from the Edo period, the Meiji and Taishō periods, and the Shōwa period.
Displays cover everything from hand-digging in the Edo period to mechanized mining; if recordings of workers’ conversations and other sounds are playing, listen as you go.
Comparing the tools in their hands and their working positions gives a clearer sense of what mining involved.
With children, questions such as “What are they using to dig?” or “Which part looks difficult?” make the exhibits approachable without prior historical knowledge.
The latter part of the route is also said to have a hands-on rock drill area, featuring a machine used to bore holes in bedrock.
Check Underground Maps in English, Chinese, Korean, and Other Languages
Nikkō City publishes mine maps in English, simplified and traditional Chinese, Korean, and Spanish, as well as Japanese.
The maps are said to use photos to show the route from the train boarding point through the tunnels, Copper Museum, and mint to the exit.
If Japanese signs are difficult to read, a map in a language you understand helps you check where exhibits are and how the route flows.
Save the map to your smartphone so you can easily check which exhibits you want to see as you go.
Learn About Copper Smelting and Uses at the Museum and Mint
Alongside the underground mining scenes, the adjoining Copper Museum and mint provide further insights into Ashio’s history.
Following the sequence of extracting ore, turning it into metal, and using it in products makes the production process easier to understand.
See How Ore Becomes Copper at the Copper Museum
The Copper Museum introduces the process of turning ore into copper.
Exhibits are said to include models recreating the Yokomabu Shaft and smelter as they once were, excavated ore, and mine carts.
Reading the displays with the underground mining scenes in mind shows why extracted material is not yet ready-to-use copper.
When you encounter a technical term, first identify the purpose of that stage to make the detailed explanation easier to follow.
Here are some terms used in copper production and processing, with simple meanings.
| Term | Simple Meaning |
|---|---|
| Mining (saikō) | Extracting ore |
| Ore dressing (senkō) | Separating out useful minerals |
| Smelting (seiren) | Extracting metal from ore |
| Casting (chūzō) | Pouring molten metal into a mold |
Discover Ashijisen Coins and Their Local Connection at the Mint
The mint is said to have displays using figures to recreate how ashijisen coins were cast in Ashio.
Ashijisen is the name given to Kan’ei Tsūhō, an Edo-period 1-mon coin, with the character 足, read as ashi, on the reverse.
Kan’ei Tsūhō was a common currency, also familiar from the period drama Zenigata Heiji, and was minted in various places until the end of the Edo period.
Coins were cast in Ashio for 5 years from 1741 (Kanpō 1), with estimates of ashijisen production ranging from around 20 million to more than 200 million coins.
Noticing the link between a tiny character and the place name helps show how the mine’s work connected with everyday life and the circulation of money.
Learn About the Ashio Mine Pollution Incident and Environmental Recovery
Understanding Ashio’s history means considering both industrial development and the damage mining pollution caused to the region.
Thinking about its effects on nature and people’s lives, as well as copper-producing technology, adds depth to a visit.
Pollution Along the Watarase River and Smoke Damage in the Mountains
In the Watarase River basin, a major flood in 1890 (Meiji 23) brought damage to crops downstream into public view.
The pollution from the mine damaged farmland and became a major social issue, with House of Representatives member Shōzō Tanaka raising it in the Imperial Diet in 1891 (Meiji 24).
In Ashio’s mountains, sulfur dioxide emissions from the smelter contributed to forest degradation alongside logging and forest fires.
Considering damage in the river basin separately from degradation in the mountains helps explain how the pollution affected such a broad area.
Look at Revegetation and Erosion Control in Ashio’s Degraded Landscape
Efforts to restore greenery in Ashio have included rehabilitating damaged slopes, erosion-control projects to reduce soil runoff, and tree planting.
Government-led forest restoration was attempted from around 1897 (Meiji 30), but continued smoke damage made progress difficult.
Full-scale revegetation began in 1956 (Shōwa 31), when improved smelting methods eliminated smoke damage, and in 1965 (Shōwa 40) Ashio pioneered the use of helicopters to revegetate remote, steep slopes that were difficult to restore by hand.
Erosion-control work has been carried out in the upper Watarase River basin since 1937 (Shōwa 12), while nearby mountainsides continue to regain greenery through tree planting by nonprofit organizations, volunteers, and elementary and junior high school students taking part in experiential learning.
As you look at the surrounding landscape, consider both its natural beauty and the work of the people who have supported its recovery.
Following up on interests sparked by the mine tour through environmental resources from Nikkō City and public agencies can deepen your understanding of the mine’s history.
About an 8-minute drive from the mine attraction, Akagane Shinsui Park contains the Ashio Environmental Learning Center, which introduces the mine’s history and environmental issues through panels and videos.
The center operates from April 1 to November 30, so keep its seasonal schedule in mind if planning a winter side trip.
How to Get to Ashio Copper Mine by Train, Bus, or Car
Public transportation options include Tsūdō Station on the Watarase Keikoku Railway or a municipal bus from the Nikkō area.
Plan both your outward and return journeys around your accommodation and next destination.
By Train: About a 5-Minute Walk from Tsūdō Station
The nearest railway station is Tsūdō Station on the Watarase Keikoku Railway.
The facility is about a 5-minute walk from the station, so enter Tsūdō in your journey planner to select the right destination.
From the Kiryū area of Gunma Prefecture, the journey to Tsūdō Station on the Watarase Keikoku Railway takes around 90 minutes.
Checking both your arrival train and your departure after the visit helps you plan enough time to enjoy the exhibits without rushing.
From Nikkō Station: Municipal Bus to Dōzan-Kankō-mae
From JR Nikkō Station or Tobu-Nikkō Station, take the Nikkō municipal bus Ashio–JR Nikkō Station Line and get off at Dōzan-Kankō-mae bus stop.
The ride takes about 50 minutes, followed by an approximately 2-minute walk to the facility.
If combining the visit with Nikkō sightseeing, plan around both bus services and the mine’s admission hours.
There are relatively few departures each day, so check your return bus in advance to avoid a rushed finish.
If using different transport modes, such as arriving by train and leaving by bus, check the boarding points and departure times for each.
By Car: About 20 Minutes from Kiyotaki Interchange, with Free Parking
By car, allow around 20 minutes on local roads toward Ashio from Kiyotaki Interchange on the Nikkō Utsunomiya Road, or about 30 minutes on local roads from Nikkō Interchange.
From Gunma Prefecture, follow National Route 122 toward Nikkō and Ashio.
The facility has free parking for 100 cars and 17 large buses.
Planning an Ashio Copper Mine Visit: Clothing, Photography, Fees, and Closing Days
You walk through the mine, so choose clothing suited to comfortable walking and carry your belongings in a manageable way.
Check official information before setting out and on-site notices on the day for exhibit access and entry conditions.
Wear Comfortable Shoes and Bring an Extra Layer
Choose stable shoes and keep bulky luggage to a minimum to make boarding, getting off the train, and walking easier.
The tunnels can feel cool even in summer, so if you are sensitive to cold, bring a jacket you can easily put on or take off to stay comfortable.
Near the end of the visit, a staircase of about 70 steps leads up toward the exit, so take breaks if you have concerns about your legs or mobility.
Wheelchair users and visitors who find stairs difficult should ask the facility about accessible entrances and tour routes in advance.
Locate the restrooms on arrival and use them before boarding the mine train for a more comfortable visit.
Follow Local Guidance on Mine Photography and Exhibits
If you want to take photos, check notices or ask staff where photography is allowed and how equipment may be used.
For filming television programs or similar productions, you must apply to Nikkō City for permission at least 7 days in advance.
Being considerate of others viewing the exhibits gives everyone a chance to pause and enjoy them.
Pets are not admitted, except assistance dogs recognized under Japan’s domestic system, so arrange somewhere for your pet to stay if you were planning to bring one.
Here are some general visitor etiquette tips for different situations.
| Situation | What to Do | What to Avoid |
|---|---|---|
| Taking photos | Keep routes clear for others | Block the passageway |
| Viewing exhibits | Observe according to posted guidance | Touch exhibits without permission |
| Moving around | Leave space behind the person ahead | Run and overtake others |
Check Admission Fees, Opening Hours, Closing Days, and Entrance Information
Notices also cover the introduction of regular closing days and changes to entrance and exit routes during construction, so avoid relying solely on older travel information.
Opening hours are 9:00 a.m. to 5:00 p.m., with last admission and the final mine train departure at 4:15 p.m.
Admission fees differ for individuals and groups of at least 15 fee-paying visitors; high school students pay the adult rate when visiting individually.
| Category | Individual | Group of 15 or More |
|---|---|---|
| Adults | 830 yen | 730 yen |
| High school students | 830 yen | 510 yen |
| Elementary and junior high school students | 410 yen | 300 yen |
| Preschool children | Free | Free |
Admission is free upon presentation at the ticket counter of a Japanese Physical Disability Certificate, Rehabilitation Certificate, or Mental Disability Health and Welfare Certificate.
Payment is accepted in cash, PayPay, or d-Barai.
Although some travel websites describe the attraction as open year-round, regular closing days are due to be introduced, with closures announced in the following categories.
- Every Thursday from December to February, except public holidays
- December 31 to January 2
- The 2nd Thursday of each month from March to November, excluding August; the 4th Thursday in August and in months when the 2nd Thursday is a public holiday
During demolition of the former rest house, temporary entrance and exit routes may be used from the temporary mine admission ticket counter in Fureai-kan.
Groups of at least 15 fee-paying visitors can reserve in advance through Nikkō City’s booking form.
Before visiting, check the following details in Nikkō City’s facility information.
- Whether the attraction is open on your visit date and when admission ends
- Fee categories based on group size and age
- Reservation conditions for group visits
- Ticket counter and entrance information
Final Tips for Visiting Ashio Copper Mine
Ashio Copper Mine in Nikkō’s Ashio district takes you underground by mine train to explore mining work through recreated scenes, the Copper Museum, and the mint.
Learning about the history of mining pollution and environmental restoration also deepens your understanding of Ashio.
Check closing days, transportation, and admission information, and arrive prepared to explore on foot.
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