It has been 12 years since the Shiretoko Peninsula and its surrounding areas were designated as a World Natural Heritage Site. However, for the coastal fisheries supporting the economy of the local community, unexpected events have been occurring, such as the incredibly poor catch of Atka mackerel (Pleurogrammus azonus) and Japanese flying squid (Todarodes pacificus). There is also the problem of the "irreversible spatiotemporal trend" regarding the ever-increasing rise in ocean temperatures accompanying global warming. In order to achieve coexistence between ecosystem conservation in the seas around Shiretoko and sustainable coastal fisheries, there is now a need for assessment and adaptation, using a "glocal" point of view that includes the ecologically and/or biologically significant areas (EBSAs) around Shiretoko, the East China Sea, and the "corridors" that connect them.