Kobayakawa Takakage
Mihara Castle was constructed in 1582 by Kobayakawa Takakage, who built this castle to protect the Mōri clan's coastline. Takakage constructed the castle on the coast, and connected it to two small islands, thus giving the castle its nickname- Ukishiro (floating castle). It had three baileys, thirty-two yagura, and fourteen gates. The "tenshu" (keep) was never constructed, though its foundation was completed, and is believed to be the largest ever constructed.