Since 1970, the Ports and Harbours Bureau, Ministry of Land, Infrastructure, Transport and Tourism and its associated organizations have been conducting the Nationwide Ocean Wave information network for Ports and HArbourS (NOWPHAS). The Port and Airport Research Institute (PARI) is playing an important role to process and analyze the wave records obtained at the network, and to present the wave statistics in a series of annual reports. This Technical Note of PARI is the 2008 version of the series, and covers the wave data obtained throughout 2008 at the 63 network stations (22 stations on the coasta of the Sea of Japan, 4 stations on the East China Sea, 1 station on the Sea of Okhotsk, and 36 stations on the Pacific Ocean). Two GPS-mounted buoys are included at the satations on the coast of the Pacific Ocean. A severe winter storm in Feburay updated the maximum significant wave height record at Toyama, Wajima, and Shibayama, on the Sea of Japan.