Shiokawa served as Parliamentary Vice Minister of International Trade and Industry from 1972 to 1973, Deputy Chief Cabinet Secretary from 1976 to 1977, Commerce and Industry Committee Chairman from 1979 to 1980, Minister of Transport from 1980 to 1981 (under Prime Minister Zenko Suzuki), Minister of Education from 1986 to 1987 (under PM Yasuhiro Nakasone), Chief Cabinet Secretary for three months in 1989 (under PM Sōsuke Uno), and Minister of Home Affairs from 1991 to 1992.