The Bilaans or Blaans are among the 110 Indigenous Peoples Group of the Philippines primarily located in South Central Mindanao. In the once-vast open area of Cogonal terrain, known as Kalon Datal, which is now Koronadal City, the B'laans were famous hunters and gatherers of food. They hunted wild animals and harvested grains, root crops, fruits, and herbs. 

The Blaan people, an indigenous group in the Philippines, are recognized as a significant part of the nation’s diverse society. The Indigenous Peoples Rights Act (IPRA) defines indigenous peoples (IPs) as societies who identify themselves as distinct, living in organized communities on communally defined territories, with shared language, customs, and traditions. The Blaan, as one such group, have maintained a unique cultural identity over time, despite external influences.

The name "Blaan" was originally thought to be derived from the region around Lake Buluan in Central Mindanao, where the Spaniards first encountered them. The Spanish missionaries, who were the first outsiders to study the non-Muslim groups in Mindanao, noted that the Blaan were spread throughout the region, particularly in central and southern Mindanao. Their primary settlements are located in the Allah and Koronadal valleys, as well as in the mountains to the west of the Davao Gulf, extending to the islands of Balut and Tumanao. In the Davao del Sur province, the Blaan occupy the mountainous and grassy plains, though their coastal settlements are limited by areas traditionally occupied by the Tagakaolo, who are riverine dwellers.

Historically, the Blaan have had close interactions with neighboring groups such as the Tboli and the Maguindanao. These interactions have resulted in intermarriages and cultural exchanges, but the Blaan have managed to retain their distinct cultural identity. Despite these influences, they remain one of the most numerous indigenous groups in Mindanao.

The National Commission for Culture and the Arts (NCCA) highlighted that while many Blaan people have adopted modern Filipino ways and integrated into the broader society, they continue to uphold and practice their indigenous rituals and customs. The Blaan's religious beliefs, traditions, and rituals have developed from their deep connection to the land, forests, and natural resources. This relationship is crucial not only to their economic livelihood but also to the growth of their culture, religion, social systems, and the overall development of their community.