This dataset includes seismic reflection data, sediment core line scanner images, and logging data from the region of the Tuaheni Landslide Complex, east of New Zealand's North Island on the Hikurangi margin. The seismic reflection data were collected in 2014 aboard RV Tangaroa (TAN1404) using GEOMAR's P-Cable system. The line scanner images and logging data were generated from sediment core recovered using gravity cores and MeBo200 drilling during Voyage SO247 aboard RV Sonne. The datasets have been used in a core-log-seismic integration study of the Tuaheni Landslide Complex.