Mizu shori (水処理): Mizu shori stands for water treatment. It involves processes used to purify and make water safe for consumption after heavy rainfall or other sources of contamination.
Kasa (傘): Kasa means umbrella in Japanese. It is an essential tool to shield oneself from rain, especially during ōame.
Kōsui (降水): Kōsui refers to precipitation in general, including rain, snow, sleet, or hail. It encompasses all forms of water falling from the atmosphere onto the Earth's surface.