Setagaya Castle Park is located in Setagaya District, Japan. It is the castle ruins of Setagaya Kira left over from the Warring States Period. It is about a 5-minute walk from Miyanosaka Station Setagaya Line. It is now a designated historical site in Tokyo. There is an old stone tablet at the entrance of the park. The park is lined with green trees, the environment is quiet, and there are rhododendrons in full bloom, which is very beautiful.