Mimaropa

Mimaropa (officially stylized in all caps), officially the Southwestern Tagalog Region () and also known as Region IV-B, is an administrative region in the Philippines. The name is an acronym combination of its constituent provinces: Mindoro (divided into Occidental Mindoro and Oriental Mindoro), Marinduque, Romblon, and Palawan. It is the only region in the country outside the Visayas that has no land border with another region.