The Japanese side planned for Yoshinaga ASANO and Mototsugu SHISHIDO, a retainer of the Mori family, to newly construct the Ulsan Japanese Castle at a place to the east of the Sosenpo Wajo where Kiyomasa set up Nawabari (castle plan; general term for the layout of a castle and its component structures) and assign Kiyomasa to defend the castle after its completion (Nagamasa KURODA was planned to be stationed in the Sosenpo Wajo).
日本側では西生浦倭城の東方に新たに浅野幸長や毛利家家臣・宍戸元続によって清正が縄張りをした蔚山倭城‎を築城し、完成後清正を守備につける予定（西生浦倭城‎には黒田長政を駐屯予定）であった。