[2] In July 2008, she was appointed cochair of a new International Commission on Nuclear Non-proliferation and Disarmament, with former Australian Minister for Foreign Affairs, Gareth Evans.

Kawaguchi served as chair of the LDP Okinawa Promotion Committee as well as co-chair of the International Commission on Nuclear Non-Proliferation and Disarmament and a board member of the World Economic Forum’s Young Global Leaders Foundation in 2008.

[5] Kawaguchi earned the approval of the parliament to go to China from April 23 to 24 to attend a conference but without prior permission, she extended for one more day to meet foreign policy official State Councilor Yang Jiechi.

Kawaguchi apologizes to Prime Minister Shinzō Abe, who is also the head of the LDP, of her unannounced leave but reasons that the last-minute arrangements with Yang was for Japan's best interests.

This extension gained a lot of criticisms from the opposition parties as Kawaguchi violated parliamentary rules as well neglected her duties.

[5][7] In December 2003, Kawaguchi received the “Aguila Azteca Medal” from Vicente Fox, President of the United Mexican States.

October the following year, she received once again an Anniversary Medal for a major contribution to global security promotion and non-proliferation regime by K. Kadyrzhanov, Director General of the National Nuclear Center.