The Efini MS-6 was the Japanese name for the 5-door hatchback variant of the 1991 Mazda 626.

The MS-6 was launched under the Efini brand, as a separate car from the Cronos

Mazda Cronos

Mazda used the Cronos name in Japan from 1991 until 1995 for a redesign of the Mazda Capella. This vehicle platform was sold in the United States as the Mazda 626 during the same period. In Japan, the station wagon variant of the older-generation GD Capella remained in production...

sedan, as Mazda was at the beginning of an ambitious 5-brand expansion plan. While the MS-6 shared the Cronos' GE platform, it was marketed as the more sporty of the two.