Kashii may refer to:
Places Kashii, Japan, a district in Higashi-ku, Fukuoka Kashii-gū, a Shinto shrine in Fukuoka
Ships Japanese cruiser Kashii, a WWII vessel
Rail transport Kashii Line, a railway line in Fukuoka Kashii Station, a railway station in Fukuoka Nishitetsu Kashii Station, a railway station in Fukuoka Kashii-Jingū Station, a railway station in Fukuoka
People Kōhei Kashii (1881–1954), Japanese general Yuu Kashii (born 1987), Japanese actress
Other uses Battle of Kashii, a 1615 battle near Osaka Kashii, a character in One Piece