Tatsuokajō Station (龍岡城駅, Tatsuokajō-eki) is a train station in the city of Saku, Nagano, Japan, operated by East Japan Railway Company (JR East).

[1] The station consists of one ground-level side platform serving a single bi-directional track.

[1] Tatsuokajō Station opened on 8 August 1915 as Onara Stop (大奈良停留場).

It was elevated to a full passenger station on 1 September 1934.

[1] With the dissolution and privatization of JNR on April 1, 1987, the station came under the control of the East Japan Railway Company (JR East).