Were there Nestorian Christians in Japan before European contact?

Question:

Answer:

Yes.
Nestorian is called as Keikyou (景教) in Japan.
As far as I know, Konoshima shrine in Kyoto and Oosake shrine in Hyougo are Nestrian.
Konoshima shrine is a mysterious shrine. No one knows when it has been established. But the name was written in Shoku-Nihongi which was written in 701.
Oosake shrine was established in 647.
Both shrines are related to Hata clan who came from foreign country. Some people believe that they came from Judea.