High Quality Content by WIKIPEDIA articles! Wakako Hironaka ( , Hironaka Wakako?, born 11 May 1934, Tokyo) is a Japanese writer and politician. SHe is a member of the House of Councillors (Upper House of the Japanese Diet). HEr political affiliation is with the Democratic Party of Japan. HEr husband is Heisuke Hironaka, a mathematician.WAkako Hironaka has been a member of the House of Councillors since 1986, and currently serving her fourth term. BEtween 1993-1994, she was State Minister, Director-General of the Environment Agency in the Hosokawa Cabinet. IN the past years, she served several times as Vice President of the Democratic Party of Japan.