Diamant Area is a portion of the Meridian Empire which streches south of its Capital, Diamant, from where it gets its name. It is limited by Diamant to the north, a bridge over a patch of sea to the northwest (which leads to Jada Area), mountains to the south and the sea to the east. This area also spots an access to Mandelro Coast, which the party visits early in the game.
The enemies around Diamant area are around Lv. 8-9, and will stop chasing the party once all its members reach Lv. 16.