Japan

House of Representatives

Political system
Parliamentary system
Structure of parliament
Bicameral
IPU membership
Yes

About parliament

Basic information such as the official name of parliament and details of its structure and leadership. Also includes the current breakdown of MPs by sex and age, and provisions for quotas and reserved seats.

Parliament name
Kokkai (National Diet)
Chamber name
Shugiin (House of Representatives)
Structure & status of parliament
Lower chamber
Parliamentary term (years)
4

IPU membership

Affiliation periods
from 1908 to 1938
from 1952
IPU Geopolitical Group/s
Asia-Pacific Group

Speaker

Official title
Speaker of the House of Representatives
Speaker
Fukushiro Nukaga (Male)
Date of birth: 11 Jan 1944
Term
20 Oct 2023
Additional information

Elected on 20 Oct. 2023.

Speaker terms

No information available

Secretary general

Official title
Secretary General
Secretary General
Noriharu Okada (Male)
Term
26 Jun 2019
Notes

Appointed on 26 June 2019.

Members

Statutory number of members
465
Principal mode of designation of members
Directly elected
Directly elected members
465
Current number of members
464
Men
414
Women
50
Percentage of women
10.8%
Statutory number of members per country 
713
Population (in thousands)
124,613
Inhabitants per parliamentarian
174,773

Age

Data on the age of parliamentarians is collected at the start of the legislature, following the most recent elections. This data is not updated during the legislature, except when parliament notifies the IPU of a change in the youngest or oldest member.

Average age of all members
55.5
(2021-11)
Youngest member
Yuki Baba (Male)
Youngest member (years)
29
Oldest member
Toshihiro Nikai (Male)
Oldest member (years)
82
Number of members, by age (2021-11)
Breakdown of members by age and gender
18 - 20 21 - 30 31 - 40 41 - 45 46 - 50 51 - 60 61 - 70 71 - 80 81 - 90 91 and over Totals per gender
Male 0 1 24 47 72 143 94 37 2 0 420
Female 0 0 3 5 6 17 13 1 0 0 45
Totals per age interval 0 1 27 52 78 160 107 38 2 0 465
Total <= 45: 80 Total >= 46: 385
Percentage of members, by age
Age at the last election or renewal Overall Male Female
Percentage of MPs 30 years of age or younger
0.2% 0.2% 0.0%
Percentage of MPs 40 years of age or younger
6.0% 5% 0.6%
Percentage of MPs 45 years of age or younger
17.2% 15% 1.7%

Reserved seats and quotas

There are reserved seats in parliament for certain groups
No
Electoral quota for women
No
Youth quota
No

Links to additional information

Parliamentary website
List of members
Rules of procedure/Standing Orders
Constitution

Historical data for IPU membership

Historical data for IPU membership
Year IPU membership
2020-09
List of values for 2020-09
No
2019-04
List of values for 2019-04
No
2018-06
List of values for 2018-06
No