M2 (エムツー, Emu Tsū) was an automobile manufacturer and subsidiary of the Mazda Motor Corporation.

M2 was responsible for the development and the production of vehicle parts, such as bodykits.

The showrooms of complete vehicles was inside the affiliated Setagaya Matsudarotari (Mazda Rotary) Building.

The company was closed in 1995, having been a victim of the asset price bubble's collapse which began in 1990 and led to Japan's Lost Decades.

The vehicles of the brand, all modified Mazda products, were made only in small numbers, making them a high priority for collectors.