The Ōi Junction (大井ジャンクション, Ōi Jankushon) is a junction that connects the Bayshore Route, Haneda Route, and Central Circular Route of the Shuto Expressway in Yashio, Shinagawa, Tokyo.

[1] In addition, due to the construction of the Central Circular Route, Ōi Parking Area moved to Yokohama on July 17, 2012.

However,[4] the closure was lifted when the route was provisionally connected to the upstream circuit on September 29, 2019.

[5] In addition, due to the abolition of the Oi Main Line tollgate, the Oi-minami Interchange, which was in front of the junction of the Bayshore Route eastbound and the Central Circular Route, was converted to exclusive use for the Central Circular Route outerbound on April 15, 2019, and the name was changed.

It was changed to the Oi-minami entrance, and from the same day, the junction of this JCT was relocated to the front (closer to Yokohama) of the Oi-minami entrance.