Wealth accumulated through trade with Ming China and Korea; the port repeatedly suffered warfare as the Ōuchi, Ōtomo, Ryūzōji, and Shimazu clans fought for control. After 1587, Toyotomi Hideyoshi restored it through Taikō urban planning, and it continued as a commercial port even under Kuroda clan rule.
Medieval Hakata Bay's shoreline changed significantly through landfill; the coordinate represents the area near Hakata waterfront adjacent to the medieval urban zone.
Certainty: HighHow far the account above is supported by the cited sources. It does not refer to the precision of the coordinates or the dating.
See it on the 1467 map