After Izumi Hichiji became a consultant, his first task was to help Harano find a doctor. He was actually quite enthusiastic about the job. Despite not being fully recovered from his injuries, he immediately gathered Asa, Ayu, and a large sum of money to set off and try to hire someone.
The elderly monk he recommended, skilled in medicine, lived on Mount Hiei, the Buddhist holy land of Japan. It wasn't very far away—barely neighboring Owari. Mount Hiei straddles Yamashiro and Omi, and getting from Owari to Omi is convenient; you just have to pass through a gap in the middle of the Ise Mountain Range the whole way.
Harano personally led people to escort Meng Ziqi to Old Wanjin, so that the old monk could come for consultation more easily. That monk had an odd quirk too; rumor was that when he went to Ming Country years ago, he was shipwrecked, and hadn't set foot on a boat since. Going to New Wanjin wasn't convenient, so Meng Ziqi had to be transported over instead.