Wakasa Province
Following the Battle of Sekigahara in 1601, the victorious Tokugawa Ieyasu awarded Wakasa Province to his general, Kyōgoku Takatsugu. At first, Takatsugu moved into Nochiseyama Castle, the ancestral seat of the Takeda clan, which was built on a mountain overlooking the city of Obama. However, he quickly decided to build a new castle on a river delta in Obama Bay, which would give him greater control of the "jōkamachi" and the strategic port. Construction was continued by his son Kyōgoku Tadataka from 1609; however, Tadataka was transferred to Izumo Province in 1634, before the castle was completed.