The Nationwide Ocean Wave information network for Ports and HArbourS, NOWPHAS, is the wave information network in Japan, conducted by the following organizations.
Ports and Harbours Bureau, Ministry of Land, Infrastructure, Transport, and Tourism (MLIT)
Tohoku, Kanto, Hokuriku, Chubu, Kinki, Chugoku, Shikoku, and Kyushu Regional Development Bureaus, MLIT
Hokkaido Bureau, MLIT
Okinawa General Office, Cabinet Office
National Institute for Land, Infrastructure and Management (NILIM)
Port and Airport Research Institute (PARI)
Real-time NOWPHAS information
Real-time NOWPHAS Website provides the “current status of significant waves, periodic band waves and tidal levels, as well as the one-minute-mean offshore water level” on a real-time basis.
Update information, unmeasured points, and other information.LINK
Download the “wave data” at NOWPHAS wave observation points (1970 and onwards)LINK
Cautions to users
Cautions to users and description of glossary
Please check these pages before use.
Description of NOWPHAS
Detailed description of NOWPHASLINK