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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)
Region selection
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.
Cautions to users
Cautions to users and description of glossary
Please check these pages before use.