In recent years, large quantities of water vapor flowing from the tropics to the mid-latitudes have caused disasters in many locations. In tracing where the water vapor comes from, we arrive at the ocean. When the ocean changes, what happens to the water vapor that flows to Japan and how will this affect future torrential rains?

The Anthropocene is increasingly recognized as a chronostratigraphic unit; however, its definition remains unclear. A Global boundary Stratotype Section and Point (GSSP) that geologically defines its beginning is required to define it. Sediment from Beppu Bay contains evidence characterizing the onset of the Anthropocene, and the 1953 layer has been identified as a suitable GSSP. The birth of the Anthropocene boundary provides scientific evidence for the Anthropocene, while also serving as a warning to humanity about the critical state of the Earth's environment.

On isolated islands, the combination of a rapidly aging population and decreasing number of residents has highlighted the critical need for environmentally friendly transportation methods in daily life. To achieve a "decarbonized society" and foster "sustainable regional circular and ecological areas," a seamless integration of public transportation and personal mobility becomes particularly significant. Given the unhurried lifestyle on these islands, the authors strongly advocate for the development of personal mobility modes that can easily adapt to various life stages while promoting eco-friendliness.