According to that text, shortly after his father was exiled to Kikai-ga-shima, Naritsune was, in the sixth lunar month of 1177, summoned to Fukuhara and then to Bitchū province before himself being sent to Kikai-ga-shima.
In June, Kiyomori moved the seat of imperial power to Fukuhara (modern day Kobe), in the hope of promoting trade with Song Dynasty China, and on the fifteenth of that month, Prince Mochihito fled Kyoto to take refuge in Mii-dera.
In addition, this businessman's name is known internationally because of the Arinobu Fukuhara House at Hakone, which Frank Lloyd Wright designed in 1918 as a Prairie-style vacation villa for the extended Fukuhara family.