It is either 50 sen from 1941 or 45 I am unsure of the distinction between the 2 but the picture on the front is Yasukuni Shrine and on the back Mount Asahi in Hokkaido Hope that this helps
50 sen from Japan, printed in 1942 or so I think. I have one of these as well; my grandfather got it from Japan when he was stationed there shortly after the end of WWII.