MLIT Japan Water Information
Ministry of Land, Infrastructure, Transport and Tourism - national river discharge and dam operation data
river.go.jp
At a glance
- Region
- Japan (Asia)
- Coverage
- Japan nationwide river systems
- Access
- Free
- Category
- Government
- Last updated
- 2025
What's inside
- River Discharge
- Dam Operations
- Flood Monitoring
- Daily Data
- Real-time Data
Terms explained
What you can do with it
Typical work that data of this type supports.
- 01
Design flows
Estimate 1-in-50 and 1-in-100 year floods for bridges, culverts and spillways.
Because it has: River Discharge
- 02
Low flows
Set environmental flows and check what is left in the river in a dry year.
- 03
Storage tracking
Follow storage and releases through the season.
Because it has: Dam Operations
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Flow forecasting
Train LSTM-style models on past records to forecast river levels and flow days ahead.
- 02
Ungauged basins
Combine with catchment data to estimate flow where there is no gauge.
- 03
Storage from space
Estimate volume from satellite water area and altimetry.
Related water data
- Japan Meteorological Agency Flood WarningsAsia | Free
- Japan Water Agency Real-time DataAsia | Free
- Singapore PUB Water Level Sensors PortalAsia | Free
- ALPS Treated Water Marine Monitoring Information (Japan MoE)Asia | Free
- APHRODITE Asian Daily Precipitation (Hirosaki University)Asia | Free
- APHRODITE Asian Precipitation Gridded Dataset (Hirosaki University)Asia | Free
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