The City Built on Coal

To understand modern Iwaki, you first need to understand coal. For much of the late 19th and 20th centuries, the Joban Coalfield — stretching across what is now Iwaki City — was one of Japan's most productive mining regions. The industry shaped the landscape, the economy, the population, and the cultural identity of the area in ways that are still visible and felt today.

The Joban Coalfield in History

Coal mining in the Joban area began in earnest during the Meiji period (1868–1912), as Japan rapidly industrialised. The mines attracted workers from across Japan, creating a uniquely diverse and dynamic local population. At the industry's peak in the mid-20th century, tens of thousands of miners worked the seams beneath southern Fukushima and northern Ibaraki.

The coal powered factories, railways, and homes across eastern Japan, making Joban coal essential to the nation's development. Mining communities grew up around the pits, complete with company housing, schools, hospitals, and cultural facilities — entire self-contained worlds underground and above.

The Decline and Transformation

Like coal industries worldwide, Joban's mines faced steep decline from the 1960s onward as cheaper imported coal undercut domestic production. Mines closed one by one, and the last major Joban colliery shut in the early 1970s. The economic blow was significant, but Iwaki's communities proved resilient.

One of the most remarkable transformations came from the Joban Hawaiian Center (now Spa Resort Hawaiians) — a leisure facility built on the geothermal hot spring water that miners had long struggled to pump out of the pits. Former mine workers and their families pivoted to tourism, keeping communities alive in a completely different way.

Where to Learn More: The Coal & Fossil Museum

Iwaki City Coal and Fossil Museum (Horuru) is an essential stop for anyone interested in the city's industrial past. The museum covers:

  • The full history of the Joban Coalfield from discovery to closure
  • Life inside the mines — tools, techniques, and daily conditions
  • The remarkable fossil discoveries made during mining operations, including ancient whale fossils
  • An extensive collection of geological specimens from the region

The museum's fossil collection deserves special mention — mining excavations accidentally uncovered extraordinary prehistoric marine fossils, including the remains of a whale species now named Palmucetus Jobanensis in honour of the coalfield.

Remnants in the Landscape

Scattered across Iwaki, observant visitors can still spot remnants of the mining era: old slag heaps now covered in vegetation, company-era housing blocks still in use, miners' shrines tucked into hillsides, and street names referencing long-closed collieries. These traces form an unofficial industrial archaeology trail for curious explorers.

Post-3/11 and the Spirit of Recovery

Iwaki was significantly affected by the March 2011 Great East Japan Earthquake and the subsequent Fukushima Daiichi nuclear crisis. The city became an important hub for displaced residents from more heavily affected areas. The recovery process — ongoing and complex — has added another chapter to Iwaki's long story of resilience and reinvention. Community-led initiatives, memorial sites, and open dialogue about the disaster form part of the cultural fabric of contemporary Iwaki.