Which island is not included in the territory of Indonesia?

Mindanao is the second-largest island in the Philippines, after Luzon and seventh-most populous island in the world. Located in the southern region of the archipelago, the island is part of an island group of the same name that also includes its adjacent islands, notably the Sulu Archipelago. As of 2015 census, Mindanao has 25,700,000 inhabitants, while the entire island group has an estimated population of 27,021,036 as of 2021.

Mindanao is mountainous, and is home to Mount Apo, the highest mountain in the country. Mindanao is surrounded by four seas: the Sulu Sea to the west,the Philippine Sea to the east, the Celebes Sea to the south, and the Mindanao Sea to the north.

Indonesia comprises islands such as : Sumatra, Java, Borneo (known as Kalimantan in Indonesia), Sulawesi, and Papua, Nusa Tenggara, Halmahera, Maluku, and another island groups.

Indonesia is a transcontinental country, where its territory consisted of islands geologically considered as part of either Asia or Australia. During the Pleistocene, the Greater Sunda Islands were connected to the Asian mainland while New Guinea was connected to Australia. Karimata Strait, Java Sea and Arafura Sea were formed as the sea level rose at the end of the Pleistocene.