Shirokinu-no Toko (Date City) is a sightseeing spot at Kitayuzawa hot spring. The source of this hot spring is very close to Osaru River, and one of the fountainheads is actually in the river. In this part of the river, the color of the rocks is light yellowish green because of the sulphur in the spring water. Shirokinu-no Toko stands for White Silk Bed in English. This is because, when the very clean water goes through this section of the river, the water bubbles are like white beautiful silk threads. There is a walking path and free foot bathing facility in front of Shirokinu-no Toko.