Mooka is a city located in Tochigi Prefecture, Japan. As of 1 August 2020, the city had an estimated population of 78,720 in 30,203 households, and a population density of 476 persons per km². The total area of the city is 167.34 square kilometres (64.61 sq mi). Moka is known for the Mooka Railway, which operates steam locomotives. The train line stretches from Shimodate, Ibaraki Prefecture to Motegi, Tochigi Prefecture. The town produces 7,000 tons of strawberries annually. The name of the city is given as "Moka City" per the city's official website; however, the local train station is "Mōka Station", and the direct transliteration of the city name into Hepburn romanization is "Mooka".

The Mooka Line is a Japanese railway line connecting Shimodate Station, in Chikusei, Ibaraki and Motegi Station in Motegi, Tochigi. It is the only railway line operated by the Mooka Railway . The third sector company took over the former JR East line in 1988. In addition to regular diesel local trains, the line also operates the SL Mooka steam service for tourists using C11 and C12 class steam locomotives.