Cheonan–Asan Station (Onyangoncheon) is a ground-level train station located mostly in Asan, Chungcheongnam-do, although part of it lies in the neighboring city of Cheonan. This station serves high-speed KTX trains that run from Seoul to either Busan or Mokpo. It is connected to (and it is possible to transfer to trains which stop at) Asan Station, a railway station on the Janghang Line which is also served by Line 1 of the Seoul Subway.