Haruo Okada, Socialist Party of Japan, 1947, 1949, 1952, 1953, 1955, 1958, 1960, 1963, 1967, 1972, 1976, 1979, 1980, 1983
Tadashi Kodaira, Socialist then Social Democratic, 1949・1953・1955・1958・1963・1967・1969・1972・1976・1979・1983
Seiichi Ikehata, Social Democratic Party, 1976-1979, 1983-1996
Shōichi Watanabe, Liberal Democratic Party, 1979, 1980, 1983, 1986, 1990, 1993
Tatsuo Takahashi, Liberal Democratic Party, 1979-1990, 1993-1996
Yukio Hatoyama, Liberal Democratic Party until 1993, New Party Sakigake, 1986-1996
Tadamasa Kodaira, Social Democratic Party, 1990-1996
Japanese general election, 1993
Yukio Hatoyama, New Party Sakigake, 111,824 votes
Tatsuo Takahashi, Liberal Democratic Party, 81,334 votes
Seiichi Ikehata, Social Democratic Party, 73,433 votes
Shōichi Watanabe, Liberal Democratic Party, 73,410 votes
Tadamasa Kodaira, Social Democratic Party, 71,993 votes
Japanese general election, 1990
Seiichi Ikehata, Social Democratic Party, 102,553 votes
Yukio Hatoyama, Liberal Democratic Party, 85,516 votes
Tadamasa Kodaira, Social Democratic Party, 85,210 votes
Shōichi Watanabe, Liberal Democratic Party, 81,793 votes
Japanese general election, 1986
Tatsuo Takahashi, Liberal Democratic Party, 100,297 votes
Yukio Hatoyama, Liberal Democratic Party, 93,001 votes
Seiichi Ikehata, Social Democratic Party, 87,603 votes
Shōichi Watanabe, Liberal Democratic Party, 84,626 votes
Japanese general election, 1983
Shōichi Watanabe, Liberal Democratic Party, 77,696 votes
Japanese general election, 1980
Shōichi Watanabe, Liberal Democratic Party, 77,918 votes
Japanese general election, 1979
Shōichi Watanabe, Liberal Democratic Party, 74,002 votes
Japanese general election, 1976
Japanese general election, 1972
Japanese general election, 1967
Japanese general election, 1963
Japanese general election, 1960
Japanese general election, 1958
Japanese general election, 1955
Japanese general election, 1953
Japanese general election, 1952
Japanese general election, 1949
Japanese general election, 1947
Hokkaido 4th district (1947–1993) Wikipedia (Text) CC BY-SA