Tokyo 7th district was a constituency of the House of Representatives in the Diet of Japan (national legislature). Between 1947 and 1993 it elected five, later four representatives by single non-transferable vote. It initially consisted of mainland Western Tokyo as a whole, namely the cities of Hachiōji and Tachikawa and the Nishitama, Minamitama and Kitatama districts of Tokyo.
For the election of 1976, Western parts were split off to form the new 11th district. As of 1993, the 7th district consisted of the cities of Tachikawa, Musashino, Mitaka, Akishima, Koganei, Kodaira, Higashimurayama, Kokubunji, Kunitachi, Tanashi, Hōya, Higashiyamato, Kiyose, Higashikurume and Musashimurayama. Following the redistricting, the ruling Liberal Democratic Party (LDP) never managed to have more than one of their candidates elected as center-left to left parties dominated the vote. In the 1986 election, the LDP stopped nominating two candidates and Kiyoshi Ozawa (later minister during the coalition with the Socialist Party) became the party's only candidate in Tokyo 7th district.
Since the electoral reform of 1994 the area is distributed over several single-member districts. The four last representatives for Tokyo 7 all ran again in the election of 1996, the first under the new system: Naoto Kan won the 18th district, Yuriko Ōno the 20th district; Kiyoshi Ozawa ran, but lost the 21st district to Democrat Jōji Yamamoto, and Kōichirō Watanabe failed to win the 19th district against Democratic newcomer Yoshinori Suematsu.
| General election | 1958 | 1960 | 1963 | 1967 | 1969 | 1972 | 1976 | 1979 | 1980 | 1983 | 1986 | 1990 | 1993 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| bgcolor=red | LDP & conservative independents | 2 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| Opposition | center-left | 0 | 0 | 0 | 1 | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | ||
| JSP | 3 | 2 | 3 | 2 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | |||
| JCP | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | |||
| Seats up | 5 | 4 | ||||||||||||||
| election year | highest vote (top tōsen) | 2nd | 3rd | 4th | 5th |
|---|---|---|---|---|---|
| 1947[1] | Tenkōkō Sonoda (JSP) | Chōjirō Kurihara (JLP) | Yoshio Namiki (DP) | Hideo Yamahana (JSP) | Tatsuo Yatsunami (DP) |
| 1949[2] | Chōjirō Kurihara (DLP) | Kazuyoshi Dobashi (JCP) | Tokuyasu Fukuda (DLP) | Tenkōkō Sonoda (Workers and Farmers Party) | Yoshio Namiki (DP) |
| 1952[3] | Kōichi Nakamura (JSP, right) | Yoshio Namiki (Progressive Party) | Hideo Yamahana (JSP, left) | Tomejirō Ōkubo (LP) | Chōjirō Kuriyama (LP) |
| 1953[4] | Tokuyasu Fukuda (Yoshida LP) | Kunitoshi Tsukumo (Yoshida LP) | |||
| 1955[5] | Yoshio Namiki (JDP) | Kōichi Nakamura (JSP, right) | Shigeo Kizaki[6] (JDP) | Tokuyasu Fukuda (LP) | |
| 1958[7] | Tokuyasu Fukuda (LDP) | Kōichi Nakamura (JSP) | Shūichi Hōjō (JSP) | Hideo Yamahana (JSP) | Yoshiyasu Hosoda (LDP) |
| 1960[8] | Hideo Yamahana (JSP) | Tokuyasu Fukuda (LDP) | Kunitoshi Tsukumo (LDP) | ||
| 1963[9] | Tokuyasu Fukuda (LDP) | Shōzō Hasegawa (JSP) | Kōichi Nakamura (JSP) | Shōji Koyama (LDP) | Hideo Yamahana (JSP) |
| 1967[10] | Kiyoshi Ōno (Kōmeitō) | Shōzō Hasegawa (JSP) | |||
| 1969[11] | Kazuyoshi Dobashi (JCP) | Kiyoshi Ōno (Kōmeitō) | Haruo Wada (DSP) | ||
| 1972[12] | Kazuyoshi Dobashi (JCP) | Tokuyasu Fukuda (LDP) | Shōzō Hasegawa (JSP) | Shōji Koyama (LDP) | |
| 1976[13] | Tokuyasu Fukuda (LDP) | Shōzō Hasegawa (JSP) | Akira Kudō (JCP) | – | |
| 1979[14] | Kiyoshi Ōno (Kōmeitō) | Akira Kudō (JCP) | Shōzō Hasegawa (JSP) | Kiyoshi Ozawa (LDP) | |
| 1980[15] | Naoto Kan (SDF) | Kiyoshi Ozawa (LDP) | Kiyoshi Ōno (Kōmeitō) | Shōzō Hasegawa (JSP) | |
| 1983[16] | Kiyoshi Ōno (Kōmeitō) | Akira Kudō (JCP) | Kiyoshi Ozawa (LDP) | ||
| 1986[17] | Kiyoshi Ozawa (LDP) | Naoto Kan (SDF) | Kiyoshi Ōno (Kōmeitō) | Akira Kudō (JCP) | |
| 1990[18] | Hiroshi Tsunematsu (JSP) | Naoto Kan (SDF) | Yuriko Ōno (Kōmeitō) | ||
| 1993[19] | Naoto Kan (SDF) | Kōichirō Watanabe (JNP) | Kiyoshi Ozawa (LDP) |