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 6, 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

Y

Name	In-House Group	Constituency/Area
YAHATA Ai	*	Kinki Bloc
YAMA Toshihiro	CDP	Hokuriku-Shinetsu Bloc
YAMADA Katsuhiko	CDP	Kyushu Bloc
YAMADA Kenji	LDP	Hyogo 7th District
YAMAGISHI Issei	CDP	Tokyo 9th District
YAMAGIWA Daishiro	LDP	Minami Kanto Bloc
YAMAGUCHI Ryoji	KM	Kita Kanto Bloc
YAMAGUCHI Shunichi	LDP	Tokushima 2nd District
YAMAGUCHI Tsuyoshi	LDP	Hyogo 12th District
YAMAHANA Ikuo	CDP	Tokyo 22nd District
YAMAKAWA Hitoshi	*	Kyushu Bloc
YAMAMOTO Daichi	LDP	Wakayama 1st District
YAMANOI Kazunori	CDP	Kyoto 6th District
YAMAOKA Tatsumaru	CDP	Hokkaido 9th District
YAMASAKI Masayasu	KM	Shikoku Bloc
YAMASHITA Takashi	LDP	Okayama 2nd District
YAMAZAKI Makoto	CDP	Minami Kanto Bloc
YANA Kazuo	LDP	Tochigi 3rd District
YANAGISAWA Tsuyoshi	CDP	Miyagi 3rd District
YARA Tomohiro	CDP	Kyushu Bloc
YATAGAWA Hajime	CDP	Minami Kanto Bloc
YAZAKI Kentaro	CDP	Chiba 5th District
YONEYAMA Ryuichi	CDP	Niigata 4th District
YOSHIDA Harumi	CDP	Tokyo 8th District
YOSHIDA Nobuhiro	KM	Kyushu Bloc
YOSHIDA Shinji	LDP	Chugoku Bloc
YOSHIKAWA Hajime	CDP	Kyushu Bloc
YOSHIKAWA Rina	SAN	Kyushu Bloc
YUNOKI Michiyoshi	CDP	Okayama 4th 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.