Kaien is a unisex given name of Japanese origin, derived from the word "kaien," which means "shellfish" or "seafood." It is often used as a given name in Japan and has gained international recognition due to its unique sound and meaning. Kaien is typically associated with water-related concepts and marine life, making it an appealing choice for parents who wish to honor nature or maritime traditions. Despite its unisex nature, Kaien is more commonly used as a boy's name. The name consists of three syllables, which gives it a flowing, musical quality when spoken aloud. There are no specific historical figures or notable characters named Kaien that have significantly impacted the name's popularity or perception. However, the name's meaning and sound contribute to its appeal for parents seeking distinctive yet meaningful names for their children.
Kaien experienced its highest popularity in 2016 with 14 births that year. Otherwise, the name has had consistent but relatively low numbers of births annually since 2005, with a total of 117 over these years.