Beginning in 2015, the Center for Integrated Area Studies (now the Institute for Southeast Asian Studies) at Kyoto University and Lafayette College embarked on a project to link open-access postcard databases. The following year, Harvard-Yenching Library joined the project. Participants from each institution traversed the Pacific to advance international and inter-institutional collaborative research. During this interval, due to the appearance of the International Image Interoperability Framework, we were able to set a course of our collaborative research. Since May 14th, 2019, the test version of this project has gone live.