This website provides rainfall amount and river water level information observed in Tokyo, as well as the warnings, alarms and special alarms in real time.
Negishi bridge
Sakai bridge
River image
Water level
Rainfall
Regulating reservoir
Floodgate tide levelLegend
River image symbol
River camera
River camera
Flood inundation water level
80% water level
50% water level
Normal
Stopped ⁄ missed
Flood inundation water level？
Flood danger water level？
Flood warning water level？
Stand-by water level for Flood Defense？
Normal
Stopped ⁄ missed10-min rainfall
More than 30 mm
20〜29mm
15〜19mm
10〜14mm
5〜9mm
3〜4mm
1〜2mm
not met 1 mm
Stopped ⁄ missedStorage ratio of regulating reservoir
100% storage ratio
80% storage ratio
50% storage ratio
Storage started
Normal
Stopped/missedFloodgate tide level (mountain side) ⁄ (ocean side)
Warning water level exceeded
Warning water level not met
Normal
Invalid
Water level
River image
Ordinary times
Water level
| Water level | |
|---|---|
 |
Flood inundation water level |
 |
Flood danger water level |
 |
Flood warning water level |
 |
Stand-by water level for Flood Defense |
 |
Water level |
| No line | Stopped ⁄ missed |
| River cross-section view | |
|---|---|
 |
Flood inundation water level is exceeded |
 |
Flood danger water level is exceeded |
 |
Flood warning water level is exceeded |
 |
Stand-by water level for Flood Defense is exceeded |
 |
Normal period |
 |
Stopped ⁄ missed |
| Observation data | |
|---|---|
 |
Missing |
| Blank | Unmeasure |
| Observation data | |
|---|---|
| Current water level(m) | 0.71 |
| A.P.(m) | 74.35 |
| Crest level descent(m) | 3.67 |
| Designated water level | Water level(m) | A.P.(m) | Crest level descent(m) |
|---|---|---|---|
| Flood inundation water level | 4.38 | 78.02 | 0.00 |
| Flood danger water level | 3.58 | 77.22 | 0.80 |
| Flood warning water level | 2.78 | 76.42 | 1.60 |
| Stand-by water level for Flood Defense | 2.08 | 75.72 | 2.30 |
| Observation date & time | 11:20 | 11:30 | 11:40 | 11:50 | 12:00 | 12:10 | 12:20 | 12:30 | 12:40 | 12:50 | 13:00 | 13:10 | 13:20 | 13:30 | 13:40 | 13:50 | 14:00 | 14:10 | 14:20 | 14:30 | 14:40 | 14:50 | 15:00 | 15:10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water level | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 | 0.71 |
* Depending on the installation condition of the water gauge,0.68m cannot be observed, therefore the measurement value will not change.
Tokyo Metropolitan - Flood Control
Integrated Information System
Rainfall
Water level
River image
