JR East's Ochanomizu station lies south of the Kanda River in Chiyoda ward.

During the Edo period, the Kanda River was rerouted to pass through Ochanomizu, which was otherwise a highland between two valleys.

The JR East portion of the station has two island platforms serving four tracks, forming a Cross-platform interchange.

The larger of the two is the Ochanomizu-bashi exit on the western end of the station which features ticket vending machines, a JR reservation office, toilets, and lockers.

The Number of Passengers on Ochanomizu Station as recorded by the East Japan Railway Company Trains in 2017-2022 was 26,006.