And for one and half years since then until Naohiro NAGAI was transferred as the lord of the Ako domain to replace Naganori, Yasuteru had served as the zaiban of the Ako-jo Castle (however, it is said that actually about 200 Karo (chief retainer) of the Tatsuno domain had served as the zaiban for the castle).
そしてその後1年半の間、長矩に代わって永井直敬が赤穂藩主として赴任してくるまで、赤穂城の在番を務めている（ただし、実際には龍野藩の家老200名などによって在番されていたという）。