Maze Sea Circuit (Japanese: 日本海間瀬サーキット) is a 2.000 km (1.243 mi) Japanese motor racing circuit at Maze, in the Iwamuro neighbourhood of Nishikan-ku, Niigata city, Niigata Prefecture Japan.

The circuit was established in 1967 by Dr. Yoshikazu Fujita, a local physician. In 1970 the track was paved and redesigned into a road racing course. Between 1978 and 1987 the track was closed.

When it reopened in 1987, racing was changed to a clockwise direction. The track layout was also realigned to improve safety conditions.

In September 2008, Round 5 of the D1 Street Legal drifting series was held at the circuit.

• Official circuit website (in Japanese)