The immensely powerful Taira no Kiyomori supposedly ordered a retainer to build Ganjaku Castle (Ganjaku-jo), which was completed in 1158, on the summit of Ganjaku-yama. After that it changed hands frequently due to war. It was destroyed by the army of the hegemon Toyotomi Hideyoshi, who ruled Japan in the latter half of the 16th century. The foundations of the castle gates and old roof tiles remain to this day.
Address: Soeda, Soeda-machi, Tagawa-gun, Fukuoka
Admission Fee: Free
[Walk]JR Soeda Station/On foot/15 min.