Many temples and shrines have a place for visitors to wash their hands and purify themselves before or during their visit. There is a wash basin here at Ninna-ji, but it is not necessary for guests to wash their hands. In fact, the basin showed to the left usually does not have running water. This basin is across from Daikoku-do and is covered by a roof that offers some nice shade.
The words written into the stone that you see in the bottom left states the date the basic was completed and who made it. The date is June of Taisho 7 (1918). I’m not sure how to read the name, but he was from an area in Kyoto known as Nishijin.