 However, it was moved further north in 801, after the "chinjufu shōgun" at the time, Sakanoue no Tamuramaro achieved a series of victories against the natives, pushing them further north.Once all of Honshū was conquered, or pacified, by the Japanese, the new base at Isawa came to be controlled by the various samurai clans of that region.The castle, along with the "chinjufu" military district and the position of "chinjufu shōgun", was abandoned in the early 14th century.