The largest structure on the island is devoted to one of the unifiers of the 16th-century Japan, Toyotomi Hideyoshi. Originally designed as a Buddhist library, the building was turned into a shrine later. After the architect's death, the construction stopped and it remains unfinished today - note that the shrine has no ceilings. Sometimes, it is called the Toyokuni Shrine.
Wikipedia (Japanese) http://ja.wikipedia.org/wiki/
Phone +81 75 561 3802
Address Japan, 〒605-0931 京都府京都市東山区大和大路通り正面茶屋町530
Coordinates 34°17'50.355" N 132°19'12.962" E