Kioichō is a district located in Chiyoda, Tokyo. Once a samurai town, the name of the district is a portmandeau derived from the names of the Kii clan, the Owari clan, and the Ii clan, all of whom had residences there during the Edo era. The Hotel New Otani Tokyo, Sophia University, Yahoo! Corporation, and Shimizudani Park are located within the district.