There is a theory stating that it was adopted from 'Teno daitei' or 'Fuso Taitei Tokofu,' which means the Polestar in ancient China and was also adopted into Taoism.
古代中国で北極星を意味し道教にも取り入れられた「天皇大帝」（てんおうだいてい）あるいは「扶桑大帝東皇父」から採ったという説。