Many oceanic plateaus such as Shatsky, Ontong Java, and Manihiki, which are believed to have been related to Late Jurassic to Early Cretaceous superplume activity (Larson, 1991), are distributed in the western Pacific. Recently, it has been suggested that these oceanic plateaus represent the products of several different starting-plume heads and that the Shatsky Rise was formed much earlier than the Ontong Java and Manihiki plateaus (Tejada et al., 1996, 2002). The Shatsky Rise formed at the triple junction of the Pacific, Izanagi, and Farallon plates in the latest Jurassic (Nakanishi et al., 1999; Sager et al., 1988, 1999). Based on magnetic lineations of the ocean floor, the period of volcanic activity of the Shatsky Rise has been estimated to be between 150 and 130 Ma (Nakanishi et al., 1999). The ocean floor at Site 1179 corresponds to the lithosphere of magnetic Anomaly M8 (Shipboard Scientific Party, 2001), which has an age of 129 Ma (Gradstein et al., 1994). At this site, oceanic crust has been produced by spreading at the Pacific–Izanagi Ridge. The timing of the formation of Site 1179 oceanic crust is just after or simultaneous with the formation of the Shatsky Rise. Because the age of the Site 1179 oceanic crust is close to the period of activity of the adjacent Shatsky Rise, we expected that the basalts from this site would preserve evidence of ridge and plume interaction. We present Sr and Nd isotope data and provide an interpretation of the geochemical features of the basalts.