Since the finance of the clan became in dire straits in around the middle of the Edo period, Mitsuzane WAKEBE, the eighth lord of the domain, carried out a reform called five-year plan for financial affairs with Gensho MIYAKE, but this plan had almost no effect.
藩財政は江戸時代中期頃になると火の車となり、第8代藩主・分部光賓は三宅玄章と共に財政5ヵ年計画という改革を断行したが、あまり効果は無かった。