Toshiki Kaifu
In 1983, Ishikawa was parliamentary vice minister for foreign affairs. In 1984, he served as the chairman of LDP's diplomacy committee. On 28 February 1990 he was appointed defense minister in the cabinet led by Prime Minister Toshiki Kaifu, replacing Juro Matsumoto in the post. Ishikawa's tenure was very brief and on 29 December of the same year he was replaced by Yukihiko Ikeda. After that, Ishikawa led the LDP's Tokyo chapter.