Kishiwada Domain was financially abundant and had its goden days under the reign of his grandfather and father, while Nagayasu established ordinances that encouraged frugality and discouraged extravagance.
藩財政は豊かで、祖父や父の藩政のもとで岸和田藩は全盛期を迎えていたが、長泰は奢侈を戒めて倹約を主とした法令を定めている。