Lord Surya connection with Buddhism and Japan : Jūni-ten -十二天 - Nit-ten

Mantra : ॐ sūryāya namaḥ

In the Buddhism of the Far East, Surya is one of the twelve Devas, as guardian deities, who are found in or around Buddhist shrines (Jūni-ten, 十二天). In Japan, he has been called "Nit-ten".He joins these other eleven Devas of Buddhism, found in Japan and other parts of southeast Asia: Indra (Taishaku-ten), Agni (Ka-ten), Yama (Emma-ten), Nirrti (Rasetsu-ten), Vayu (Fu-ten), Ishana (Ishana-ten), Kubera (Tamon-ten), Varuna (Sui-ten), Brahma (Bon-ten), Prithvi (Chi-ten), Chandra (Gat-ten). On the Mount Meru buddhist cosmological system, Surya is considered a female deity, contrasting a male lunar god......

日天（にちてん、にってん、Skt：Sūrya、音写：蘇利耶、修利、修野など、またAditra、音写：阿弥怛とも）は、仏教における天部の一人で、十二天の一人。

For More :

https://en.wikipedia.org/wiki/Surya

https://ja.wikipedia.org/wiki/%E6%97%A5%E5%A4%A9