a channel
adjustment
babbling waterway
buildings
civil engineering
construction
disaster
disaster prevention
echigo plain
fish ladder
flood
flood control
floodgate
flooding
flow
heavy rain
infrastructure and transport
japan
koshinetsu region
measures
ministry of land
niigata prefecture
okawazu branch office
okawazu channel
okawazu water level observatory
okawazu water park
oketsu
oketsu weir
park
rising
river
river office
river park
shinano river
shinano river office
sinano
taiga
tsubameshi
wash dam
water
water flow
water gate
water level
water level observation
watershed
weir
xiamen gate washed