|Mr. WADA Yoshiaki||LDP||Hokkaido 5th District|
|Mr. WAKAMIYA Kenji||LDP||Tokyo 5th District|
|Ms. WANIBUCHI Yoko||KM||Kinki Bloc|
|Ms. WASEDA Yuki||CDP||Kanagawa 4th District|
|Mr. WASHIO Eiichiro||Ind||Niigata 2nd District|
|Mr. WATANABE Hiromichi||LDP||Chiba 6th District|
|Mr. WATANABE Koichi||LDP||Hokkaido Bloc|
|Mr. WATANABE Shu||*||Shizuoka 6th District|
* No abbreviation
List of the In-House Groups in the House
In principle, House Members' names are spelled with the Hepburn system.
District: Single-seat constituency
Bloc: Proportional representation area
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.