China. (Japanese Post Office In Manchuria). 1918. Registered envelope addressed to the United States bearing Japan SG 163, 10s blue (pair) tied by Moukden/I.J.P.O. in violet with 'I.J.P.O. Moukden' registered label with Yokohama transit and 'Opened by Examiner/ 5353' label with Indiana arrival on reverse. Nice item.