Chart of the Week



The official campaigning period for the 2022 House of Councillors election in Japan began on June 22. The ratio of women among total candidates running for a national election has exceeded 30%, for the first time since 1946. Should we expect to see more female MPs in the Diet after July 10?

Trends in the percentages of female candidates and winners are shown in Fig. 1 and Fig. 2. The share of female candidates as well as that of elected women have been always higher in the House of Councillors (upper house) than in the House of Representatives (lower house). While women occupy 23.1% of the total seats in the upper house (before election), women’s share falls to 9.7% in the lower house.

Percentages of women who ran
Fig. 1:Percentages of women who ran for and won in the general elections for the House of Representatives (Source: Gender Equality Bureau, Cabinet Office)

Percentages of women who ran2
Fig. 2:Percentages of women who ran for and won in the regular elections for the House of Councillors (Source: Gender Equality Bureau, Cabinet Office)
Note: The term of the House of Councillors is fixed. All members shall serve six years, with half of them up for election every three years.

The largest reason for the small number of female MPs is the small number of female candidates. In particular, the Liberal Democratic Party (LDP), which is a center-right ruling party, as well as its coalition partner KOMEITO, have shown poor performances in political recruitment of female candidates. As Table 1 demonstrates, in the previous upper house election in 2019, the percentages of female candidates affiliated with these two parties were extremely low. While the situation has improved in 2022, perhaps thanks to the enhanced monitoring by media and concerned citizens, the LDP and KOMEITO have not caught up with opposition parties in their attempts to recruit more women.

Table 1:Targeted and actual percentages of female candidates for the upper house elections by major parties
name of major parties female candidates in the 2019 election target number for female candidates, voluntarily set by parties for the 2022 election female candidates in the 2022 election
Liberal Democratic Party 14.60% 30% in the PR list 30.3% in the PR list, 23.2% in total
KOMEITO 8.30% not announced 20.80%
Japan Innovation Party 31.80% not announced 30.40%
Constitutional Democratic Party 45.20% 50% in total 51.00%
Democratic Party for the People 35.70% 35% in total 40.90%
Social Democratic Party 71.40% 50% in total 41.70%
Japan Communist Party 55.00% 50% in total 55.20%
Source: Ministry of Internal Affairs and Communications 2019, Asahi shimbun online May 25, 2022, and June 22, 2022.


On the other hand, we must pay attention to the women’s chances of being elected. Table 2 compares winning rates between male and female candidates running from the same party in the 2019 upper house election.

Table 2: Number of candidates, winners, winning rates by gender and party affiliation in the 2019 upper house election
Women Men
name of major parties number of candidates number of elected winning rates (%) number of candidates number of elected winning rates (%)
Liberal Democratic Party 12 10 83.3 70 47 67.1
KOMEITO 2 2 100.0 22 12 54.5
Japan Innovation Party 7 1 14.3 15 9 60.0
Constitutional Democratic Party 19 6 31.6 23 11 47.8
Democratic Party for the People 10 1 10.0 18 5 27.8
Social Democratic Party 5 0 0.0 2 1 50.0
Japan Communist Party 22 3 13.6 18 4 22.2
Source: Source: Ministry of Internal Affairs and Communications 2019, calculation by the author.


It is noteworthy that female candidates of the LDP were more likely to be elected than male candidates of the same party, and the same applied to the KOMEITO candidates. In contrast, the winning rates of female candidates of opposition parties were lower than those of male candidates. Since the election rule of the House of Councillors has an effect of promoting not only competition among political parties but also competition among candidates running from the same party, it is likely that candidates’ genders have some influence in both negative and positive ways, in the candidate selection processes by parties, resource mobilization in campaigns, and voters’ choices. In any case, how many more women will take the seats in the upper house is left in the hands of voters.