In the summer of FY2025 (July and August), there were 446 water-related accidents involving 535 people (including 241 fatalities and missing persons). Most drowning incidents occurred at sea (53.8%) and rivers (35.0%), accounting for 88.8% of all cases. Kanagawa Prefecture ranked third worst nationwide with 26 reported drowning incidents. (Source: National Police Agency, Bureau of Safety, Division of Safety Planning, "Overview of Drowning Incidents in Reiwa 7," June 18, R8) Many of these accidents can be prevented with proper prior knowledge and a little caution. The Kanagawa Prefectural Branch of the Japanese Red Cross Society is actively promoting public awareness to prevent water-related accidents. This article explains essential knowledge for avoiding accidents and what to do in case of an emergency. ■ Seven Golden Rules for Water Play 1 Don't make unrealistic plans. ・It's dangerous to go near water when fatigued or sleep-deprived. ・Never go near water alone. 2 Always check the weather. ・Check weather conditions, wind direction and speed, temperature, and tides via weather forecasts or online sources. 3 Avoid areas with unstable footing. ・Surfaces may be slippery or contain sharp rocks, posing injury risks. → Play only in areas where you can clearly see the ground beneath your feet. 4 Stay away from prohibited or dangerous areas. ・Never approach rocky areas or breakwaters, especially during high waves. 5 If a river suddenly rises, immediately move away from the water. ・Be alert if the river water suddenly becomes murky or large tree branches start floating downstream. 6 Never chase after swept-away objects. ・Do not pursue anything that has floated toward you or drifted away from you. → Always prioritize personal safety—for example, with sandals or balls. 7 Wear a life jacket. ・Wearing a life jacket reduces the risk of accidents. → Wear it even in shallow water—never let your guard down. Next, we'll explain in detail the life jacket, introduced as rule number sev