Demographics of Indonesia in the context of "Java"

The Balinese (Balinese: ᬳᬦᬓ᭄‌ᬩᬮᬶ, romanized: Anak Bali (in the ketah register), ᬯᭀᬂᬩᬮᬶ, Wong Bali (in the madia register), ᬓ᭄ᬭᬫᬩᬮᬶ, Krama Bali (in the singgih register); Indonesian: Orang Bali) are an Austronesian ethnic group native to the Indonesian island of Bali and the surrounding islands. The Balinese population of 4.2 million (1.7% of Indonesia's population) live mostly on the island of Bali, making up 85% of the island's population. The Balinese are distinctive amongst the ethnic groups of Indonesia for their adherence to Balinese Hinduism rather than Abrahamic religions such as Islam or Christianity.

There are also significant populations on the island of Lombok and in the easternmost regions of Java (e.g. the regency of Banyuwangi), most of them are descendants of Balinese since the kingdoms era who once controlled the region. Some Balinese can also be found in Balinese migrant areas such as Lampung and Sulawesi regions, mainly due to the migration following the eruption of Mount Agung in 1963 as well as the transmigration program enacted by the Indonesian government.

The Buginese (Buginese: To Ugi, Lontara script: ᨈᨚ ᨕᨘᨁᨗ; Indonesian: Orang Bugis), or simply Bugis, are an Austronesian ethnic group who are the most numerous of the three major linguistic and ethnic groups of South Sulawesi (the others being Makassarese and Torajan), in the south-western province of Sulawesi, third-largest island of Indonesia. The Bugis converted from animism to Islam in 1605. A small minority adhere to Christianity and a pre-Islamic indigenous belief called Tolotang.

The Bugis, whose population numbers around six million and constitutes less than 2.5% of the Indonesian population, are influential in the politics of the country, and historically influential on the Malay Peninsula, Sumatra, Borneo, Lesser Sunda Islands and other parts of the archipelago where they have migrated en masse, starting in the late seventeenth century. The third president of Indonesia, B. J. Habibie, and a former vice president of Indonesia, Jusuf Kalla, are of Bugis descent. In Malaysia, the reigning Yang di-Pertuan Agong (King of Malaysia), Sultan Ibrahim and eighth prime minister, Muhyiddin Yassin, have Bugis ancestry.

Rumah adat are traditional houses built in any of the vernacular architecture styles of Indonesia, collectively belonging to the Austronesian architecture. The traditional houses and settlements of the several hundreds ethnic groups of Indonesia are extremely varied and all have their own specific history. It is the Indonesian variants of the whole Austronesian architecture found all over places where Austronesian people inhabited from the Pacific to Madagascar each having their own history, culture and style.

Ethnic groups in Indonesia are often associated with their own distinctive architectural form of traditional housing. The houses are at the centre of a web of customs, social relations, traditional laws, taboos, myths and religions that bind the villagers together. The house provides the main focus for the family and its community, and is the point of departure for many activities of its residents. Villagers build their own homes, or a community pools its resources for a structure built under the direction of a master builder or carpenter.