Ikko ikki (literally, "Ikko-sect riot") is a general term for riots during Japan's Sengoku period (period of warring states) (Japan) caused by followers of the Hongan-ji Temple branch within the Jodo Shinshu sect (the True Pure Land Sect of Buddhism), which was also called the "Ikko" or "only one direction (to heaven)" sect.
一向一揆（いっこういっき）は、戦国時代(日本)に浄土真宗（一向宗）浄土真宗本願寺派の信徒たちがおこした一揆の総称。