Japan Dam Water Level Info

Japanese Dam's water level in one tap from the Google map.Graphing is also supported .This application's data is Ministry of Land, Infrastructure, Transport and Tourism(MLIT).This application is unofficial Application , because If bugs and demand exists in this app, please contact developer (@kagamikarasu).
For the latest data please confirm the " MLIT River information website (http://www.river.go.jp/) " .