Accordingly, Nagamasa and Josui made a survey of four sites: Sumiyoshi, Hakozaki, Aratsu-yama hill (present-day Nishi-kōen Park), and Fukuzaki. After careful consideration, Fukuzaki was chosen as the castle site. Fukuzaki, in the proximity of Hakata, was a place where a castle town could easily be constructed, and it was valuable as a naval port; furthermore, it had geostrategic advantages; it was surrounded by a cove, rivers, and hills. Thus Josui chose Fukuzaki, which is present-day Fukuoka, now one of the largest cities in Japan.