In 1997, Omi was appointed as the Director of the Economic Planning Agency. He briefly acted as a Minister of State for Science and Technology Policy and Minister of State for Okinawa and Northern Territories Affairs under Prime Minister Junichiro Koizumi between 2001 and 2002.[2][1] He was on a diplomatic mission to the United States during the 11 September 2001 attacks.[citation needed] Between 2006 and 2007, he served as the Minister of Finance under Shinzō Abe. Omi supported increases in the national consumption tax, although Abe distanced himself from this policy and sought to achieve much of his budget balancing through spending cuts.[3]