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vol.110 No.7 July 2025
The blessings and awe of the water cycle
In recent years, the frequency of heavy rainfall disasters in Japan has increased significantly, with such events now occurring almost annually. On a global scale, water cycle-related challenges—including food insecurity due to droughts and even issues of geopolitical stability—are becoming increasingly critical as climate change progresses.
This article presents an overview of the current understanding and remaining uncertainties regarding the water cycle, as well as the status of water-related issues both in Japan and internationally. It also explores potential strategies for addressing these challenges by highlighting effective practices.
Although this journal has previously published numerous articles on the water cycle, the recent increase in both the frequency and severity of water-related disasters has led to several special issues focusing on the disaster-related aspects of water. In addition to addressing this “fear” aspect, this article seeks to highlight the “blessings” that water resources and the water cycle bring to human society. By considering both the blessings and the risks associated with water, we aim to promote a more comprehensive understanding of the multifaceted nature of water issues and their interconnections with a wide range of sectors and systems.
