The Stranding Network Hokkaido (SNH) has collected cetacean stranding information since 2007 along the coast of Hokkaido, Japan, with the collaboration of the Hokkaido University, Tokyo University of Agriculture, Obihiro University of Agriculture and Veterinary Medicine, and with assistance from the National Museum of Natural History, and the Institute of Cetacean Research, Japan. This data set includes at least 23 cetacean species.