How one of Earth's worst volcanic disasters affected societies in prehistoric Japan

In a groundbreaking international study, researchers from Lund University and Cambridge University have unveiled the intricate ways in which the Kikai-Akahoya volcanic eruption, which occurred in prehistoric Japan around 7,300 years ago, impacted human societies. This cataclysmic event, which unleashed powerful earthquakes, colossal tsunamis, and a thick layer of volcanic ash, initially led to widespread belief that it triggered a societal collapse.

However, the research team, led by Peter Jordan and Enrico Crema, discovered that the aftermath was far more nuanced and complex than initially thought.

While the eruption did cause significant declines in population due to ecosystem damage and the creation of uninhabitable areas, the researchers found evidence that humans were remarkably resourceful. Survivors not only adapted to the new challenges but also managed to increase their numbers in some cases. This resilience manifested in various ways, including migration to safer coastal areas, adaptation to marine resources, and innovative economic systems.

The study underscores the unpredictable and multifaceted nature of disaster recovery, highlighting the fact that societies can adjust, collaborate, and find new connections even in the most dire circumstances. The findings suggest that demographic patterns varied greatly across different regions of Japan, with northern Kyushu experiencing continued growth despite the disaster, while southern Kyushu saw a long-term decline.

This complex interplay of factors, possibly influenced by short-term climate change, changes in deer and boar populations due to the ash-covered landscapes, and other volcanic impacts, demonstrates the resilience and adaptability of human societies in the face of extreme adversity.