The music for the Japanese anthem waws "composed in 1880 by Hiromori Hayashi, Imperial Court musician, and later harmonized according to the Gregorian mode by Franz Ekert, a German bandmaster."
Original verse composed by Ki no Tsurayuki, ca. 872-945.

http://www.japanorama.com/kimigayo.html

I have been remiss in not checking mudcat for previous threads on anthems, and comments on the Japanese Anthem.