On April 4, 2010, Yosano, Takeo Hiranuma, Hiroyuki Sonoda, Takao Fujii and Yoshio Nakagawa announced their plans to leave the LDP to establish a new political party, the Sunrise Party of Japan.
A native of Hiroo District, Hokkaidō and dropout of Kanagawa University, he was elected to the House of Councillors as a candidate for the Liberal Democratic Party for the first time in 1998 after serving in the prefectural assembly of Hokkaidō for five terms.
Tomoka Nakagawa | Ōishi Yoshio | Oishi Yoshio | Akinori Nakagawa | Yoshio Masuda | Yoshio Machida | Yoshio Kondo | Yoshio Kojima | Masaharu Nakagawa (House of Representatives) | Yoshio Utsumi | Yoshio Urushibara | Yoshio Shinozuka | Yoshio Nishina | Yoshio Nakamura | Yoshio Nakagawa | Yoshio Koide | Nakagawa Jun'an |