(as of January 10, 2018)
|Liberal Democratic Party||283 (22)|
|The Constitutional Democratic Party of Japan||54 (13)|
|The Party of Hope||51 (2)|
|The Group of Independents||14 (2)|
|Japanese Communist Party||12 (3)|
|Nippon Ishin (Japan Innovation Party)||11 (1)|
|Liberal Party||2 (0)|
|Social Democratic Party||2 (0)|
Note: Figures in parentheses show the number of women members.
In-House Group: A group of House Members who engage in joint activities within the House. Usually, a political party forms an in-House group inside the House, but occasionally there are cases where a group is formed by (1) House Members who do not belong to a particular political party, (2) a political party and a House Member or Members who do not belong to any political party, or (3) two or more political parties.