Composition
of the House

Officers of the House
Strength of the In-House Groups in the House of Representatives
List of Members

(As of October 29, 2025)

A	B	C	D
E	F	G	H
I	J	K	L
M	N	O	P
Q	R	S	T
U	V	W	X
Y	Z

I

Name	In-House Group	Constituency/Area
IBAYASHI Tatsunori	LDP	Shizuoka 2nd District
ICHIKI Tomoko	CDP	Kita Kanto Bloc
ICHIMURA Koichiro	JIP	Kinki Bloc
IDE Yosei	LDP	Hokuriku-Shinetsu Bloc
IGARASHI Eri	CDP	Tokyo 30th District
IGARASHI Kiyoshi	LDP	Kita Kanto Bloc
IKEDA Maki	CDP	Hokkaido 5th District
IKEHATA Kotaro	JIP	Kinki Bloc
IKESHITA Taku	JIP	Osaka 10th District
IMAEDA Soichiro	LDP	Aichi 14th District
IMAI Masato	CDP	Gifu 4th District
INADA Tomomi	LDP	Fukui 1st District
INATOMI Shuji	CDP	Fukuoka 2nd District
INO Toshiro	LDP	Gunma 2nd District
INOKUCHI Sachiko	JIP	Tokyo Bloc
INOUE Hidetaka	JIP	Osaka 1st District
INOUE Shinji	LDP	Tokyo 25th District
INOUE Takahiro	LDP	Fukuoka 1st District
ISAKA Nobuhiko	CDP	Hyogo 1st District
ISHIBA Shigeru	LDP	Tottori 1st District
ISHIBASHI Rintaro	LDP	Chugoku Bloc
ISHIDA Masatoshi	LDP	Kinki Bloc
ISHIHARA Hirotaka	LDP	Tokyo 3rd District
ISHII Tomoe	DPFP	Shikoku Bloc
ISHIKAWA Kaori	CDP	Hokkaido 11th District
ITO Nobuhisa	JIP	Osaka 19th District
ITO Shunsuke	CDP	Tokyo 23rd District
ITO Tadahiko	LDP	Tokai Bloc
ITO Tatsuya	LDP	Tokyo Bloc
ITO Yoshitaka	LDP	Hokkaido Bloc
IWATA Kazuchika	LDP	Kyushu Bloc
IWATANI Ryohei	JIP	Osaka 13th District
IWAYA Takeshi	LDP	Oita 3rd District
IZUMI Kenta	CDP	Kyoto 3rd 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.