The Moonlight Echigo (ムーンライトえちご) was a seasonal rapid overnight train service operated by East Japan Railway Company (JR East), which runs from Shinjuku to Niigata in Niigata Prefecture via the Takasaki Line, the Joetsu Line, and the Shinetsu Main Line.

Moonlight Echigo services are formed of 6-car 485 series electric multiple unit (EMU) sets K1 and K2 based at Niigata Depot.

[1] The service was first introduced on 30 June 1986, as a seasonal train named simply Moonlight (ムーンライト), to directly compete with overnight bus services between Tokyo and Niigata introduced the previous year.

[2] The locomotive-hauled rolling stock was replaced by EMUs from September 1987.

[2] From March 14, 2009, the daily Moonlight Echigo was discontinued and became a seasonal train running only during Japanese holidays.