Japan Meteorological Agency
1-3-4 Otemachi, Chiyoda-ku
Committed to GLOSS
Data acquisition rate
Original data is analogue with the digitised data having an hourly interval.
Fast delivery data at UHSLC
High frequency data at BODC
High frequency data at UHSLC
Real-time data available
All data are referred to a Datum Line (DL) associated with the tide gauge.
The Standard Mark (SM) is physically located near the tide gauge and is directly leveled to a First Order Bench Mark of the Geographical Survey Institute.
The SM is 3.745m above the DL and 2.238m above the TP (mean sea level of Tokyo Bay, or Peil).