Japan

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
Sangiin (House of Councillors)
Structure & Status of parliament This field is to indicate lower/upper in the back end.
Upper chamber
Parliamentary term (years)
6

IPU membership

Affiliation periods
from 1908 to 1939
from 1952
IPU Geopolitical Group/s IPU Geopolitical Groups: African Group, Arab Group, Asia-Pacific Group, Eurasia Group, Group of Latin America and the Caribbean (GRULAC), Twelve Plus Group.
Asia-Pacific Group

Speaker

Official title The Speaker may for example be known as the Presiding Officer, President, Chairman/Chairperson, etc.
President of the House of Councillors
Speaker
Akiko Santo (Female)
Year of birth
1942
Term
01.08.2019
Additional information
Elected on 1 Aug. 2019.
See historical data for this field.

Secretary General

Official title This post is most commonly called Secretary General or Clerk. It may also be called Secretary, Head/Chief of the Secretariat, Director General, etc.
Secretary General
Secretary General
Takashi Okamura (Male)
Notes Additional information about the Secretary General, in particular regarding their term.
Elected on 9 Dec. 2019.

Members

Statutory number of members Statutory number of members, as defined in the constitution or other fundamental law.
248
See historical data for this field. Compare data of this field.
Principal mode of designation of members
Directly elected members Directly elected by citizens.
248
Note on the statutory number of members
In accordance with amendments to the electoral law, promulgated on 25 July 2018, the number of members elected under the majority system has increased from 146 to 148, and those elected under the proportional system increased from 96 to 100. Accordingly, the total number of members of the House of Councillors has increased from 242 to 248. The new statutory number is being applied in two phases. In the July 2019 elections one half of the 148 seats under the proportional representation system (i.e. 74) and one half of the 100 majority seats (i.e. 50) were renewed. The 124 new members have joined the remaining 121 members (whose term is not up in 2019), and the House of Councillors now has a total of 245 members. The House of Councillors will have the full 248 after the next half renewal, due in 2022.
See historical data for this field.
Current number of members Number of members who currently hold seats in parliament. May be lower or higher than the statutory number of members.
245
See historical data for this field. Compare data of this field.
Men The number of male parliamentarians who currently hold seats in parliament.
189
See historical data for this field.
Women The number of female parliamentarians who currently hold seats in parliament.
56
See historical data for this field.
Percentage of women Calculated by dividing the current number of women by the current number of members.
22.86% See historical data for this field.
Statutory number of members per country As defined in the constitution or other fundamental laws. Combines the number of parliamentarians in both chambers in bicameral parliaments.
713 See historical data for this field.
Population (in thousands) Source: United Nations, World Population Prospects.
127,975
See historical data for this field.
Inhabitants per parliamentarian Calculated by dividing the population by the statutory number of parliamentarians.
179,488 See historical data for this field.

Age

Data on the age of parliamentarians is collected at start of the legislature, following the most recent elections. This data is not updated during the legislature.

 

Average age of all members Age at the time of the last election or renewal.
56.11
See historical data for this field. Compare data of this field.
Youngest member (years) Age at the time of the last election or renewal.
Youngest member
Nobuo Yasue (Male)
Oldest member (years) Age at the time of the last election or renewal.
84
Oldest member
Toranosuke Katayama (Male)
Number of members, by age
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
Totals per age interval 0 0 14 32 23 91 59 25 1 0
Total <= 45: 46 Total >= 46: 199
Male 0 0 8 20 14 73 49 24 1 0 189
Female 0 0 6 12 9 18 10 1 0 0 56
Percentage of members, by age
Age as last election or renewalOverallMaleFemale
Percentage of MPs 30 years of age or younger0%0%0%
Percentage of MPs 40 years of age or younger5.71%3.27%2.45%
Percentage of MPs 45 years of age or younger18.78%11.43%7.35%
Members for whom data is available
245 See historical data for this field.

Reserved seats and quotas

There are reserved seats in parliament for certain groups Reserved seats are a means to ensure the parliamentary representation of certain groups in society.
Electoral quota for women Quotas to promote the representation of women in parliament.