Otaki Castle

Ōtaki Castle is a flatland-style Japanese castle located in the town of Ōtaki within Chiba Prefecture, Japan. While the original fortification was erected by the Satomi clan in the early 1500s to guard the northern Bōsō Peninsula, the structure currently recognized dates its primary significance to 1590. In that year, the famous general Honda Tadakatsu was ordered by Toyotomi Hideyoshi to construct a new fortress to help contain local rivals. The castle subsequently served as the administrative center for the Ōtaki Domain throughout the Edo period, ruled successively by the Honda, Abe, Aoyama, Inagaki, and Matsudaki clans, although the domain's wealth significantly decreased over time.

The physical structure suffered a turbulent history marked by neglect and disaster. By 1672, reports indicated that not a single gate remained functional and the main four-story keep had collapsed into ruins. Although rebuilt shortly after, this reconstruction burned down in 1842 and was never restored during the feudal era, leading to the site's demolition in 1871 following the Meiji Restoration. For over a century, the location remained without its iconic central tower, reflecting the decline of many such military installations after the end of the shogunate.

In 1975, the main keep was reconstructed to stimulate local tourism and serve as an annex for the Chiba Prefectural Sonan Museum. Because no definitive records of the original design survived, architects modeled the new concrete structure after sketches from 1832 depicting the castle's last known appearance. Today, the interior houses historical artifacts, including collections of traditional armor and swords, and the site is open to the public. Recognized as one of the Continued Top 100 Japanese Castles in 2017, the grounds also host an annual festival in late September featuring parades of participants dressed in Edo-period samurai costumes.