valley
asia
attractions
eruption
fukiwarinotaki
gunma
gunma prefecture
japan
kanto
kanto region
katashina valley
magma
material
mineral
natural
natural monument
numata
orient
points of interest
pyroclastic flow
river
rock
spot
spray
stone
stratum
tonegawa
tourism
tourist attractions
tourist spot
volcano
water
water flow
water splash
waterfall