Yashio is a district of Shinagawa, Tokyo, Japan. The current administrative place names are Yashio 1-chome to Yashio 5-chome. It is an area where the residential address has been displayed. It corresponds to the area on the north side of Ōi Wharf Part 1. The south side of Ōi Wharf 1 is Tokai, Ōta, Tokyo.