[citation needed] The other branch of the family, which had established itself in Kawachi Province, was the ancestor of the Nakagawa clan, which ruled the Oka Domain for the entirety of the Edo period.

In 1188, when Yoritomo advanced to the Shirakawa Barrier to attack the Oshu-Fujiwara clan, he visited the Kawabe Hachiman-gu Shrine in the land of Ishikawa and prayed for a victory, and after three days' stay, headed for the battlefield of Mt.

When the Kamakura bakufu (Japanese feudal government headed by a shogun) fell and the Kenmu Restoration started in 1333, Ishikawa Tokimitsu went up to Kyoto and was appointed to Junior Fifth Rank, Lower Grade, the Imperial Household Secretary by the new government, and Junior Fourth Rank, Lower Grade, the Master of the Palace Table in 1334.

Sadamitsu raised the army to make a stand but was defeated instead, and in 1335, followed Ashikaga Takauji and took the side of the Northern Court.

A senior vassal Mizoi Rokuro insisted on Akimitsu's clear assertion that he bear no treacherous intentions against Hideyoshi, but nobody agree to that opinion; and at last, they were obliged to serve the Date family.

On this occasion, some members of the clan followed Akimitsu and moved to Kakuda, the others abandoned the samurai status and remained in Ishikawa as farmers and merchants.