Following its snap election, Japanese politics has entered uncharted waters

Prime Minister Ishiba’s election gamble has failed. Japan now faces another period of political uncertainty, which could affect its international standing.

Expert comment Published 7 November 2024 4 minute READ

Kazuto Suzuki

Associate Fellow, Asia-Pacific Programme

In Japan’s snap election on 27 October, the ruling coalition of the Liberal Democratic Party (LDP) and New Komeito lost the overwhelming majority it had held since the 2012 general election. The ruling coalition now has 215 seats, leaving it 18 seats short of a majority. 

The largest opposition party is the Constitutional Democratic Party of Japan (CDP), which gained 50 seats to 148. The second largest opposition party is the Japan Innovation Party (Ishin), which lost six seats to 38, and the third largest opposition party is the National Democratic Party (NDP), which gained 21 seats to 28.

But the opposition is divided and there is no real appetite to form a coalition government. This will likely result in a hung parliament, which will further destabilize Japan’s government.

The election results reveal three key things  about the state of Japanese politics and what comes next.

First, that Prime Minister Ishiba’s snap election gamble has failed. The aim was for Ishiba, a non-mainstream member of the LDP, to strengthen the party base and stabilize his administration. But with the ruling coalition losing its majority, the party base has been further weakened and the Ishiba administration is now more likely to be short-lived. LDP voters as well as the public in general  had hoped that Ishiba, as the ‘opposition within the party’, would change the LDP’s structure and government policies, eliminate the uncertainty surrounding party funding and increase transparency on how MPs use public funds to finance political activities.

However, when Ishiba became LDP leader and prime minister, he abandoned his previously more critical stance and prioritized carrying on the policies of the mainstream LDP, leaving his supporters feeling betrayed.

Second, while the ruling coalition has been punished, the people of Japan still did not vote for a change of government. The opposition is divided and, despite its gains in this election, the CDP is not fully committed to take the lead and consolidate the opposition to form a coalition. The CDP also suffers from internal division. The left wing of the party would prefer a coalition with the Communist Party, while the right wing of the party does not want to form a coalition with the LDP or the Communist Party, preferring a partner such as the NDP.

The NDP is in a position to control the fate of Ishiba administration. 

Third, the NDP has become the key to future Japanese politics. By becoming the minority ruling party, the NDP is in a position to control the fate of Ishiba administration. While the CDP has no intention of cooperating with the LDP, the NDP is more willing to do so in order to implement its own policies. As the budget cannot be passed without the NDP’s cooperation, the ruling coalition will have no choice but to accept the NDP’s policy of substantial tax cuts through the expansion of tax credits. It will also likely have to accept an option for married couples to decide their family names, which requires a change of civil codes and is something it has been reluctant to do so far. 

If the NDP’s demands are rejected, a no-confidence motion will likely be submitted and passed, leaving the Ishiba cabinet with no choice but to resign or dissolve the House of Representatives (the lower house of Japan’s parliament).

But the NDP has chosen to not form a coalition with the ruling party and enter government. Why? From the NDP’s point of view, forming a coalition with the LDP, would mean getting involved in the LDP’s internal turmoil – something it wishes to avoid. In addition, elections to the House of Councillors (upper house of parliament) will be held in the summer of 2025. The NDP may have judged that it will have a better chance of implementing its policies by cooperating with the government on a case-by-case basis, rather than forming a coalition with a party that is losing public support and risk following suit.

The minority ruling system that has emerged after the election is extremely rare in Japan’s political history and is likely to make its politics even more unstable in the years ahead. The Ishiba administration will probably be able to survive until the budget is passed in March next year by cooperating with the NDP, but beyond that its prospects are unclear.

As the House of Councillors elections get closer, some in the LDP may say that they cannot fight the election with Ishiba as prime minister. If so, they may choose the option of a same-day election for the lower and the upper house. The cost of an election campaign is significant, and the LDP’s financial strength gives it an advantage in the case of a same-day election. There is also a strong possibility that the public will choose the LDP to regain stability in government. However, this election has shown that public distrust of the LDP is high, and if Ishiba continues to be pushed around by the NDP, his party’s chances of winning would be reduced.

Japanese politics has entered uncharted waters, where the patterns and customs of the past do not apply. There are now doubts both at home and abroad as to whether Ishiba, who has a weak party base, will be able to stay on and steer the government. Over the past decade, the Abe and Kishida administrations have provided Japan with political stability, which has in turn enhanced its international presence. An unstable political system, with frequent changes of government, will likely lead to a decline in Japan’s international influence.

Although Trump might be open to Ishiba’s demand for parity with the US, he could become irritated with Ishiba’s weak domestic position.

There is also a risk that US–Japan relations  could become unstable. Although the NDP does not have a strong agenda to change the course of this relationship, Ishiba may struggle to keep the promise made by his predecessors to increase defence spending. Ishiba’s nationalist posture could also create a confrontational relationship with the United States, while his weak leadership means he may not seek to invest in strengthening the US–Japan alliance. 

Donald Trump’s win in the US presidential election could pose a further risk. Although Trump might be open to Ishiba’s demand for parity with the US, he could become irritated with Ishiba’s weak domestic position. Ishiba may not be able to make decisions – or a deal with Trump – unless the NDP agrees to it.

There will likely be little change for Japan’s policy towards China. Ishiba was a frequent visitor to Taiwan before he became prime minister, so he is not expected to improve the Japan–China relationship. Meanwhile, the NDP is mindful of Chinese disinformation and industrial espionage in Japan.

At a time of heightened tension in the Asia-Pacific, Ishiba must demonstrate that he can manage international affairs despite his weak domestic power base.

Weak leadership in Japan’s domestic politics may affect its importance and presence in the world. Prime ministers Abe and Kishida were able to make Japan as an important player in the geopolitical and geoeconomic structure because of their strong domestic leadership. 

At a time of heightened tension in the Asia-Pacific, as China shows off its strength against Taiwan and North Korea finalizes development of an intercontinental ballistic missile (ICBM), Ishiba must demonstrate that he can manage international affairs despite his weak domestic power base. Crucially, he must demonstrate that the US–Japan alliance is ironclad.