It is known that Jurakudai was once called "Uchino Okamai" (or Uchino no Onkamae) during construction, which first appears in "Tamon-in Nikki" (The Diary of Tamon-in Temple), in the section of February 27, 1586, 'the construction of Uchino Okamai began on the last 21st.'
聚楽第は、建造中は「内野御構」（うちのおかまい／うちののおんかまえ）と呼ばれていたことが知られており、その初見は『多聞院日記』天正14年2月27日の条にある「去廿一日ヨリ内野御構普請」。