From Old Japanese *ame*, reconstructed as the native Yamato word for rain. The kanji 雨 is a pictograph: the top horizontal stroke represents the sky, the box below it is a cloud, and the four dots depict falling raindrops — one of the most visually intuitive characters in the entire script.

Rain holds deep cultural significance in Japan. The rainy season (梅雨, *tsuyu*, literally "plum rain") arrives in early June — right around this word's scheduled date — and lasts roughly six weeks. Japanese has a remarkably rich vocabulary for rain: *kirisame* (霧雨, drizzle), *harusame* (春雨, spring rain / also a type of glass noodle), and *niwakame* (俄雨, sudden shower), reflecting centuries of close attention to precipitation in an agricultural society. Note that 雨 can also be read *u* in Sino-Japanese compounds (e.g., 雨天 *uten*, rainy weather).