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The kanji 沢 is a shinjitai (modern simplified form) of the kyūjitai (old character form) 澤. Its origin is phono-semantic, consisting of a semantic component and a phonetic component. The character is composed of the water radical (氵, a simplified form of 水) on the left, which indicates its meaning is related to liquid or marshes. The right-hand component, 睪, serves a dual role. While it primarily provided the ancient pronunciation, 睪 itself is a character depicting a hand (丂) and an eye (罒) over a criminal (幸, originally representing shackles), conveying the idea of "to spy on" or "to hunt." Thus, the original conceptual formation of 澤 was "a watery place where one hunts or gathers." Historically, the character 澤 first appeared on bronze inscriptions during the Zhou Dynasty and was standardized in the clerical script (隷書) during the Han Dynasty. It consistently meant "marsh," "swamp," or "wetland," a place where water collects. The character also developed extended meanings such as "lustre," "moisture," "benefit," and "grace," all deriving from the fundamental concept of water's nourishing and gloss-imparting qualities. This character, along with the rest of the Chinese writing system, was introduced to Japan in waves, primarily through the Korean peninsula and later directly from China, starting around the 5th century AD. An important linguistic note is the simplification process. In Japan, the 1946 Tōyō Kanji list introduced the shinjitai 沢, which replaced the complex right-hand component 睪 with the simpler 尺. This specific simplification is unique to Japanese shinjitai; the Chinese simplified character for "swamp" is 泽, which uses 夅 on the right. Furthermore, in modern Japanese, 沢 is also used as a counter for streams (e.g., 一沢) and appears in many place names and surnames, reflecting the country's abundant water features. Its on'yomi is "TAKU," and its kun'yomi is "sawa."