The coastal zone is a vital resource for humanity, and its ecological health is crucial for the sustainable development of coastal regions. While the fundamental processes of coastal dynamics are universal, significant regional variations exist. The shores of Russia’s Far Eastern seas, which span arctic to temperate zones, present a unique and urgent case study. Historically, industrial development began during a period of weak coastal activity and sediment accumulation. However, a widespread increase in erosion in the latter half of the twentieth century, combined with a disregard for natural forces, created significant risks. The recent expansion of the oil and gas industry has intensified the need for better understanding, generating vast amounts of geological data. This data must now be synthesized to advance geomorphological science and inform practical applications. A key challenge is that the behavior of these Subarctic shores often defies traditional theories, as they have rarely been studied as independent systems.