Takamatsu Castle Park.

“Takamatsu Castle (Takamatsu-jō) is located in central Takamatsu, Kagawa Prefecture, on the island of Shikoku. It is also called Tamamo Castle, literally ‘seaweed castle’, for its seawater moats. The castle was headquarters of the Takamatsu Domain, which ruled eastern Sanuki Province (modern-day Kagawa) from 1588 to 1869. It is now a park. The castle site has been a National Historic Site since 1955. This castle is one of three in Japan to use seawater moats, along with Imabari Castle in Ehime Prefecture and Nakatsu Castle in Ōita Prefecture.”

The castle was being renovated during my visit and hidden under covers.