Had I known that Inuyama’s Castle was one of only 12 authentic Japanese castles remaining in Japan today—the rest were destroyed after the fall of the Shogunate, I would have tried to visit it. Instead I went to Meiji Mura, an open-air architectural museum for preserving and exhibiting buildings from the Meiji (1867–1912) and Taishō (1913–1926) eras, including the main entrance and lobby of Tokyo's old Imperial Hotel, designed by Frank Lloyd Wright and built in 1923.
Wiki: Inuyama Castle is located on a hill overlooking the Kiso River in what is now the city of Inuyama. Inuyama Castle is often claimed without any historical justification as the "oldest castle in Japan"; however, Inuyama Castle is one of 12 castles to have retained its Edo Period donjon (Tenshukaku) intact. This main tower is small but due to its complex form, it shows different silhouettes depend on the angle. Among the 12 remaining main towers, the donjon at Inuyama Castle is designated as a National Treasure of Japan, as are Matsumoto Castle, Hikone Castle and Himeji Castle.