 He also began lecturing at Kyushu International University in 1991.Yamamoto initially ran under the LDP in the general election of 1990 in the fourth precinct of Fukuoka, but could barely not secure any of the four allotted lower house seats.He returned in 1993 to the same precinct for the next general election under the newly formed Japan Renewal Party (an LDP split-off), and won first place out of the four elected representatives.