Iwashimizu Hachimangū (石清水八幡宮) is a Shinto shrine in the city of Yawata in Kyoto Prefecture, Japan.

The shrine's Heian period connections with the Kyoto and the Imperial family date from its founding in 859 (Jōgan 1)[1] when construction on its earliest structures commenced.

[6] In 965, Emperor Murakami ordered that Imperial messengers were sent to report important events to the guardian kami of Japan.

[7] The shrine's importance and influence grew in succeeding centuries; and its extensive landholdings led to modest conflicts with Minamoto no Yoritomo during the years in which the Kamakura shogunate was establishing itself.

From 1871 through 1946, Iwashimizu Hachimangū was officially designated one of the Kanpei-taisha (官幣大社), meaning that it stood in the first rank of government supported shrines.