Hawaiian religion refers to the indigenous religious beliefs and practices of native Hawaiians, also known as the kapu system. Hawaiian religion is based largely on the tapu religion common in Polynesia and likely originated among the Tahitians and other Pacific islanders who landed in Hawaiʻi between 500 and 1300 AD. It is polytheistic and animistic, with a belief in many deities and spirits, including the belief that spirits are found in non-human beings and objects such as other animals, the waves, and the sky. It was only during the reign of Kamehameha I that a ruler from Hawaii island attempted to impose a singular "Hawaiian" religion on all the Hawaiian islands that was not Christianity.

Hewahewa was a Hawaiian religious leader who served as kahuna nui of King Kamehameha I and his successor Kamehameha II. Hewahewa was a powerful figure in the royal court of Hawaii and played a major role in the abolition of the kapu system, the decline of the native religion of Hawaii, and the introduction of Christianity to the Hawaiian Kingdom.