a river
aikawa town
building
dam
electrical
gravity type concrete dam
hydraulic power
hydro power generation
ishikaki lake
kanagawa prefecture
kiyokawa
lake
lake miyagase
miyagase
miyagase dam
mountain stream
nakatsugawa
nakatsugawa valley
nature
park
power
power generation
river
sagamihara city
scenic site
tourism
tourist spot
valley
water