When Nagamasa KURODA was transferred to another domain after the Battle of Sekigahara, Sotan, who had once been the country's wealthiest merchant, fell to the level of chartered merchant of the Kuroda clan.
そして関ヶ原の戦いの後に黒田長政が移封されると、宗湛は天下の大商人から黒田氏の御用商人にまで成り下がった。