He was previously a Japan Foundation Fellow at Rikkyo University, Tokyo and an IRCHSS Government of Ireland Doctoral Scholar at the UCD Humanities Institute. He completed his PhD dissertation in 2011 and his research monograph based on this, Sat? and America: U.S.-Japanese Relations, 1964-1972, was published by Palgrave in 2015. His research focuses on post-war U.S.-Japanese relations and on nuclear weapons history.