Nene Pimentel was a proponent of federalism in the Philippines. He has proposed 5 states in Luzon (North Luzon, Cordillera, Central Luzon, Southern Tagalog, and Bicol), 1 federal capital (Metro Manila), 4 states in Visayas (East Visayas, Central Visayas, Western Visayas, and Minparom), and 3-4 states in Mindanao (Bangsamoro, Southern Mindanao, and Northern Mindanao - which may be divided into Northeast Mindanao and Northwest Mindanao). He also proposed the establishment of two autonomous regions within the proposed Bangsamoro federal state, as the Muslims of the Sulu archipelago do not want to be lumped with the Muslims of mainland Mindanao due to their distinct culture.