| In 1086, the Retired Emperor Shirakawa built an Imperial villa, Toba-dono Palace (also known as Jonangu), by enlarging and remodeling the villa, which was presented to him by FUJIWARA no Suetsuna, by the Ogura-ike Pond. |
応徳3年（1086年）、白河上皇は藤原季綱から献上された巨椋池の畔の別業に拡張・改造を加えて離宮・鳥羽殿（城南宮）を造営した。 |