Shiroyama ParkShiroyama Park is a public park located in Takayama, Gifu Prefecture, Japan. In 1873, the park was established in the mountainous area around the ruins of Takayama Castle. The park's name means "castle mountain."WWW city.takayama.lg.jp/shise...OutlineThe park covers an area of. It has over 1,000 Yoshino cherry trees and is popular in the spring time when they are in bloom.