| Name | In-House Group | Constituency/Area |
|---|---|---|
| TABATA Hiroaki | LDP | Toyama 1st District |
| TACHIBANA Keiichiro | LDP | Toyama 3rd District |
| TADOKORO Yoshinori | LDP | Kita Kanto Bloc |
| TAGAYA Ryo | * | Minami Kanto Bloc |
| TAIRA Masaaki | LDP | Tokyo 4th District |
| TAJIMA Kaname | CDP | Chiba 1st District |
| TAKAGI Kei | LDP | Tokyo 12th District |
| TAKAHASHI Ei | CDP | Shikoku Bloc |
| TAKAHASHI Hideaki | JIP | Kita Kanto Bloc |
| TAKAI Takashi | * | Kita Kanto Bloc |
| TAKAICHI Sanae | LDP | Nara 2nd District |
| TAKAMATSU Satoshi | CDP | Tokyo 28th District |
| TAKAMI Yasuhiro | LDP | Shimane 2nd District |
| TAKEBE Arata | LDP | Hokkaido 12th District |
| TAKEGAMI Yuko | Ind | Tokai Bloc |
| TAKEMASA Koichi | CDP | Kita Kanto Bloc |
| TAKEMURA Nobuhide | LDP | Shiga 3rd District |
| TAKEUCHI Chiharu | CDP | Kita Kanto Bloc |
| TAKEUCHI Yuzuru | KM | Kinki Bloc |
| TAMAKI Yuichiro | DPFP | Kagawa 2nd District |
| TAMURA Norihisa | LDP | Mie 1st District |
| TAMURA Takaaki | JCP | Kyushu Bloc |
| TAMURA Tomoko | JCP | Tokyo Bloc |
| TANAHASHI Yasufumi | LDP | Gifu 2nd District |
| TANAKA Kazunori | LDP | Kanagawa 10th District |
| TANAKA Ken | DPFP | Shizuoka 4th District |
| TANAKA Ryosei | LDP | Saitama 15th District |
| TANI Koichi | LDP | Hyogo 5th District |
| TANNO Midori | DPFP | Aichi 11th District |
| TANOSE Taido | LDP | Nara 3rd District |
| TATSUMI Kotaro | JCP | Kinki Bloc |
| TERADA Minoru | LDP | Chugoku Bloc |
| TERATA Manabu | CDP | Tohoku Bloc |
| TEZUKA Yoshio | CDP | Tokyo 5th District |
| TOGASHI Hiroyuki | LDP | Akita 1st District |
| TOKAI Kisaburo | LDP | Hyogo 10th District |
| TOKUYASU Junko | JIP | Kinki Bloc |
| TSUCHIDA Shin | LDP | Tokyo 13th District |
| TSUCHIYA Shinako | LDP | Saitama 16th District |
| TSUJI Hideyuki | CDP | Fukui 2nd District |
| TSUJI Kiyoto | LDP | Tokyo 2nd District |
| TSUMURA Keisuke | CDP | Chugoku Bloc |
| TSUNODA Hideo | KM | Minami Kanto Bloc |
| TSUSHIMA Jun | LDP | Aomori 1st District |
Notes:
* No abbreviation
List of the In-House Groups in the House
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.