Okayama 성, also known as Okayama Castle, is a historic Japanese castle located in Okayama Prefecture. It was originally built in 1597 by Ukita Hideie and is known for its striking black exterior, which has earned it the nickname "Crow Castle." The castle features a unique architectural style and is surrounded by a beautiful park, Okayama Korakuen, one of Japan's three great gardens. Although the original structure was destroyed during World War II, it was reconstructed in 1966 and now serves as a museum, showcasing artifacts and history related to the castle and the region.