Just for the record: I have just come back from Christmas Eve Mass in Japanese at my local church (N Kyoto). The melodies of Silent Night and Joy to the World both featured, sung in Japanese. The priest (from Quebec) mentioned that many of the congregation would be visiting temples and shrines over the festive period and that that was 'zehi' - to be encouraged - that we should embrace our god always and everywhere. The service began around a small bonfire in the garden, from which we lit candles and processed to church along the street. After that there was fruit cake (made by the priest) and coffee. Some people wore kimonos and lace headcoverings. I didn't take any pix but I recorded it - PM me if you are interested.