| Name | In-House Group | Constituency/Area |
|---|---|---|
| TABATA Hiroaki | LDP | Hokuriku-Shinetsu Bloc |
| TACHIBANA Keiichiro | LDP | Toyama 3rd District |
| TADOKORO Yoshinori | LDP | Ibaraki 1st District |
| TAIRA Masaaki | LDP | Tokyo 4th District |
| TAJIMA Kaname | CRA | Minami Kanto Bloc |
| TAKAGAI Emiko | LDP | Shimane 1st District |
| TAKAGI Hirohisa | LDP | Hokkaido 3rd District |
| TAKAGI Kei | LDP | Tokyo 12th District |
| TAKAHASHI Yusuke | LDP | Hokkaido 2nd District |
| TAKAICHI Sanae | LDP | Nara 2nd District |
| TAKAMI Ryo | JIP | Osaka 2nd District |
| TAKAMI Yasuhiro | LDP | Shimane 2nd District |
| TAKATORI Shuichi | LDP | Niigata 5th District |
| TAKAYAMA Satoshi | MIRAI | Tokyo Bloc |
| TAKAZAWA Kazumoto | DPFP | Tokyo Bloc |
| TAKEBE Arata | LDP | Hokkaido 12th District |
| TAKEDA Ryota | LDP | Fukuoka 11th District |
| TAKEI Shunsuke | LDP | Kyushu Bloc |
| TAKEMURA Nobuhide | LDP | Shiga 3rd District |
| TAMAKI Yuichiro | DPFP | Kagawa 2nd District |
| TAMIYA Hisato | LDP | Chiba 9th District |
| TAMURA Norihisa | LDP | Mie 1st District |
| TAMURA Tomoko | JCP | Tokyo Bloc |
| TANAHASHI Yasufumi | LDP | Gifu 2nd District |
| TANAKA Kazunori | LDP | Kanagawa 10th District |
| TANAKA Ken | DPFP | Tokai Bloc |
| TANAKA Masashi | LDP | Tokyo Bloc |
| TANAKA Ryosei | LDP | Saitama 15th District |
| TANI Koichi | LDP | Hyogo 5th District |
| TANI Koichiro | SAN | Kinki Bloc |
| TANIGAWA Tom | LDP | Osaka 19th District |
| TANNO Midori | DPFP | Aichi 11th District |
| TANOSE Taido | LDP | Nara 3rd District |
| TATSUMI Kotaro | JCP | Kinki Bloc |
| TAWARADA Yuji | LDP | Chugoku Bloc |
| TERADA Minoru | LDP | Chugoku Bloc |
| TOGASHI Hiroyuki | LDP | Akita 1st District |
| TOKAI Kisaburo | LDP | Hyogo 10th District |
| TOKASHIKI Naomi | LDP | Kinki Bloc |
| TOYOTA Mayuko | SAN | Kita Kanto Bloc |
| TSUCHIDA Shin | LDP | Tokyo 13th District |
| TSUCHIYA Shinako | LDP | Saitama 16th District |
| TSUJI Hideki | LDP | Tokai Bloc |
| TSUJI Kiyoto | LDP | Tokyo 2nd District |
| TSUJI Yuko | LDP | Tokyo Bloc |
| TSUNODA Hideo | CRA | Minami Kanto Bloc |
| TSUSHIMA Jun | LDP | Aomori 1st District |
Notes:
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.