aging
blue sea
blue sky
boom
building
closure
coal mine
coal mining
collapse
degradation
devastation
dykes
end island
energy
energy revolution
gunkanjima
industrial
industrial facilities
industrial revolution
industrial revolution heritage
island
island coal mine
kyushuyamaguchi modernization industrial heritage
landing
legacy modernization
legacy of the industrial revolution
limit
meiji era
mining
modern
modern industrial heritage
nagasaki
nagasaki prefecture
on the industrial heritage
outlying islands
reinforced concrete
rubble
ruins
sea
sea mines
shore protection
sky
tour
tourism
uninhabited islands
warship island
warship island cruise
wave
workers