While some Hindus consider Buddha as an incarnation of Vishnu, Buddhists in Sri Lanka venerate Vishnu as the custodian deity of Sri Lanka and protector of Buddhism.

Vishnu is also known as Upulvan or Upalavarṇā, meaning 'Blue Lotus coloured'.
Some postulate that Uthpala varna was a local deity who later merged with Vishnu while another belief is that Utpalavarṇā was an early form of Vishnu before he became a supreme deity in Puranic Hinduism.
According to the chronicles of Mahāvaṃsa, Cūḷavaṃsa, and folklore in Sri Lanka, Buddha himself handed over the custodianship to Vishnu.
Others believe that Buddha entrusted this task to Sakra (Indra), who delegated this task of custodianship to god Vishnu.
Many Buddhist and Hindu shrines are dedicated to Vishnu in Sri Lanka.
In addition to specific Vishnu Kovils or Devalayas, all Buddhist temples necessarily house shrine rooms (Devalayas) closer to the main Buddhist shrine dedicated to Vishnu.

John Holt states that Vishnu was one of the several Hindu gods and goddesses who were integrated into the Sinhala Buddhist religious culture, such as the 14th and 15th-century Lankatilaka and Gadaladeniya Buddhist temples.
He states that the medieval Sinhala tradition encouraged Visnu worship (puja) as a part of Theravada Buddhism just like Hindu tradition incorporated the Buddha as an avatar of Vishnu, but contemporary Theravada monks are attempting to purge the Vishnu worship practice from Buddhist temples.
According to Holt, the veneration of Vishnu in Sri Lanka is evidence of a remarkable ability over many centuries, to reiterate and reinvent culture as other ethnicity have been absorbed into their own.
Though the Vishnu cult in Ceylon was formally endorsed by Kandyan kings in the early 1700s, Holt states that Vishnu images and shrines are among conspicuous ruins in the medieval capital Polonnaruwa.

Vishnu iconography such as statues and etchings have been found in archaeological sites of Southeast Asia, now predominantly of the Theravada Buddhist tradition.
In Thailand, for example, statues of four armed Vishnu have been found in provinces near Malaysia and dated to be from the 4th to 9th-century, and this mirror those found in ancient India.
Similarly, Vishnu statues have been discovered from the 6th to 8th century eastern Prachinburi Province and central Phetchabun Province of Thailand and southern Đồng Tháp Province and An Giang Province of Vietnam.
Krishna statues dated to the early 7th century to 9th century have been discovered in Takéo Province and other provinces of Cambodia.

Archeological studies have uncovered Vishnu statues on the islands of Indonesia, and these have been dated to the 5th century and thereafter.
In addition to statues, inscriptions and carvings of Vishnu, such as those related to the "three steps of Vishnu" (Trivikrama) have been found in many parts of Buddhist southeast Asia.
In some iconography, the symbolism of Surya, Vishnu and Buddha are fused.

In Japanese Buddhist pantheon, Vishnu is known as Bichū-ten (毘紐天), and he appears in Japanese texts such as the 13th century compositions of Nichiren.
While some Hindus consider Buddha as an incarnation of Vishnu, Buddhists in Sri Lanka venerate Vishnu as the custodian deity of Sri Lanka and protector of Buddhism. 
Vishnu is also known as Upulvan or Upalavarṇā, meaning 'Blue Lotus coloured'. Some postulate that Uthpala varna was a local deity who later merged with Vishnu while another belief is that Utpalavarṇā was an early form of Vishnu before he became a supreme deity in Puranic Hinduism. According to the chronicles of Mahāvaṃsa, Cūḷavaṃsa, and folklore in Sri Lanka, Buddha himself handed over the custodianship to Vishnu. Others believe that Buddha entrusted this task to Sakra (Indra), who delegated this task of custodianship to god Vishnu. Many Buddhist and Hindu shrines are dedicated to Vishnu in Sri Lanka. In addition to specific Vishnu Kovils or Devalayas, all Buddhist temples necessarily house shrine rooms (Devalayas) closer to the main Buddhist shrine dedicated to Vishnu.
John Holt states that Vishnu was one of the several Hindu gods and goddesses who were integrated into the Sinhala Buddhist religious culture, such as the 14th and 15th-century Lankatilaka and Gadaladeniya Buddhist temples. He states that the medieval Sinhala tradition encouraged Visnu worship (puja) as a part of Theravada Buddhism just like Hindu tradition incorporated the Buddha as an avatar of Vishnu, but contemporary Theravada monks are attempting to purge the Vishnu worship practice from Buddhist temples. According to Holt, the veneration of Vishnu in Sri Lanka is evidence of a remarkable ability over many centuries, to reiterate and reinvent culture as other ethnicity have been absorbed into their own. Though the Vishnu cult in Ceylon was formally endorsed by Kandyan kings in the early 1700s, Holt states that Vishnu images and shrines are among conspicuous ruins in the medieval capital Polonnaruwa.
Vishnu iconography such as statues and etchings have been found in archaeological sites of Southeast Asia, now predominantly of the Theravada Buddhist tradition. In Thailand, for example, statues of four armed Vishnu have been found in provinces near Malaysia and dated to be from the 4th to 9th-century, and this mirror those found in ancient India. Similarly, Vishnu statues have been discovered from the 6th to 8th century eastern Prachinburi Province and central Phetchabun Province of Thailand and southern Đồng Tháp Province and An Giang Province of Vietnam. Krishna statues dated to the early 7th century to 9th century have been discovered in Takéo Province and other provinces of Cambodia. 
Archeological studies have uncovered Vishnu statues on the islands of Indonesia, and these have been dated to the 5th century and thereafter. In addition to statues, inscriptions and carvings of Vishnu, such as those related to the "three steps of Vishnu" (Trivikrama) have been found in many parts of Buddhist southeast Asia. In some iconography, the symbolism of Surya, Vishnu and Buddha are fused.
In Japanese Buddhist pantheon, Vishnu is known as Bichū-ten (毘紐天), and he appears in Japanese texts such as the 13th century compositions of Nichiren.
Vishnu