As a relay port connecting the Japan Sea to Kyoto, it handled tribute rice, iron, and kelp; in the Sengoku period, it was compared to Sakai. Rulers changed successively from the Wakasa Takeda to the Asakura, Niwa, Asano, Kinoshita, and Kyōgoku clans.
Medieval port facilities do not fully correspond to the present Obama harbor; the coordinate represents the estimated docking area north of the old castle town.
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