(as of February 5, 2019)
|Liberal Democratic Party||282 (22)|
|The Constitutional Democratic Party of Japan||68 (15)|
|Democratic Party For the People||38 (2)|
|Komeito||29 (4)||Japanese Communist Party||12 (3)|
|Nippon Ishin (Japan Innovation Party)||11 (1)|
|The Reviewing Group on Social Security Policy||7 (0)|
|Social Democratic Party||2 (0)|
|The Party of Hope||2 (0)|
|Future Japan||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.