What's New (Top 5)

Feb. 06, 2026

Tide (Hour Tidal Height) Data was updated.
Hourly sea level height data (2024) at tide stations, Japan Meteorological Agency.
Hourly sea level height data (2025) at tide stations, Organizations related to the Japan Coast Guard.

Mar. 26, 2025

Tide (Hour Tidal Height) Data was updated.
Hourly sea level height data (2024) at tide stations, Organizations related to the Japan Coast Guard.

Mar. 19, 2025

Tide (Hour Tidal Height) Data was updated.
Hourly sea level height data (2023) at tide stations, Organizations related to the Japan Coast Guard.

Mar. 10, 2025

Tide (Hour Tidal Height) Data was updated.
　Hourly sea level height data (2023) at tide stations,　Geospatial Information Authority of Japan.

Mar. 07, 2025

Regarding the tidal data, there was a malfunction with the download software, which resulted in an old format (data spread over 2 lines per day), but it has now been restored to the original single-line format.