The Leading Coalition Accelerates a Constitutional Amendment
articles on Constitution
By Takuya Nishimura, Senior Fellow, Asia Policy Point
Former editorial writer for the Hokkaido Shimbun
You can find his blog, J Update here.
June 1, 2026
The leading coalition of the Liberal Democratic Party (LDP) and the Japan Innovation Party (JIP) has accelerated its effort to amend the Constitution of Japan to deal with emergencies. The two parties claim that the discussion of proposed amendments is nearly wrapped up. However, some opposition parties expect further discussion. Even LDP lawmakers are divided over whether the Lower House or the Upper House should be the primary forum for debate. Prime Minister Sanae Takaichi encourages the discussion, presenting herself as a brave leader grappling with a divisive issue – but with no clear hope of success.
An amendment to address emergencies that prevent the Diet from acting have taken at least two forms. One was a rough draft of an amendment that the Lower House Legislation Bureau submitted to the Commission on the Constitution of the House on May 14. The draft primarily would add a clause to the constitution that would, in the event of certain emergencies, allow Diet members to remain in office even after their terms expire. The amendment recognizes four categories of emergency: a major natural disaster, a major spread of infectious disease, social disorder by civil war and an armed attack of foreigners.
According to the draft, each of these emergencies can create an “election difficulty situation”: a time in which a national election cannot be held in broad geographic areas for a certain long period. Members of the Lower House have four-year terms, and six years are given to those elected to the Upper House. The draft of the amendment states that these terms will be extended in emergency. An election difficulty situation will be declared in advance by the Cabinet with the approval of the Diet.
A second type of response to an emergency is also in the draft. It includes a controversial provision to authorize the Cabinet to issue an “emergency ordinance.” “In a special occasion in which it cannot afford to wait for legislation by the Diet,” the draft says, “the Cabinet can enact an emergency ordinance which is equivalent to a law.” Although the draft requires approval of the Diet after the ordinance is declared, there is no time limit on Diet action and thus no time limit on an emergency ordinance.
A member of the Lower House commission who represents the LDP, Yoshitaka Shindo, commented to the press that most parties agreed on the extension of terms of lawmakers in emergency and that issue can be said to be “pinned down.” Another commission member from the JIP, Nobuyuki Baba, said that all the talking points on the amendment have now been proposed and discussed. The two parties in the leading coalition hope to proceed to the next step of drafting a provision to initiate an amendment.
Opposition parties do not want to rush the process. The Centrist Reform Alliance disagreed with Baba’s notion that the discussion was over and that new measures were necessary to maintain the ordinary functions of the Diet in an emergency. Article 54 of the Constitution of Japan already provides that the Cabinet can convoke an emergency session of the Upper House in a national emergency. The opposition parties believe that this existing power to gather the Upper House in an emergency session will ensure that the Diet will function even if the Lower House is empty.
Opposition parties are further skeptical about introducing the emergency ordinance. The leader of Democratic Party for the People, Yuichiro Tamaki, argued that the proposal for an emergency ordinance power was dropped in an agreement of five parties, including the LDP and the JIP, in 2024. Moreover, a situation in which the Diet would not work at all was unimaginable if lawmakers’ terms could be extended. The Japan Communist Party has pointed out that there was an imperial emergency ordinance in pre-war Japan that was issued in Great Kanto Earthquake in 1923. That power confirmed that the emperor had the highest state power.
This concept of imperial authority ended after World War II. Article 41 of the constitution states that the Diet is “the highest organ of state power and shall be the sole law-making organ of the State.” If the Cabinet obtains the power to issue ordinances that are equal to a statute passed by the Diet, the relationship between the legislative and executive branch under the constitution will fundamentally be changed. The introduction of the executive branch’s power to declare an emergency ordinance would erode the status of the Diet as the supreme organ of state power.
An unignorable fact in the discussion over the constitutional amendment is that the leading coalition does not have even a simple majority in the Upper House. A super majority – a two-thirds vote – in each House of the Diet is necessary for a constitutional amendment to move forward. While the LDP and the JIP have that majority in the Lower House after the LDP’s sweeping victory in the February elections, they do not have even a simple majority in the Upper House.
The Upper House is focused on an entirely different constitutional issue. In the meeting of the Upper House Commission on the Constitution on May 20, the main topic of discussion was not the emergency clause but the election system. In Upper House elections, each prefecture has had its own seats. But with the decline of eligible voters, the districts of Tottori and Shimane were integrated into a single district, just as the Tokushima and Kochi were combined, for the 2016 election and thereafter. Members of the Upper House from both sides of the aisle have urged the elimination of such integrated districts
The LDP accordingly has proposed a constitutional amendment to abolish integrated prefectural districts. However, the top opposition party in the Upper House, the Constitutional Democratic Party of Japan (CDPJ), does not believe that an amendment is necessary; rather, the Diet can achieve this end simply by amending the election laws. Komeito, as a partner of the CDPJ in the Lower House, supports this view.
The LDP and JIP have different priorities regarding a constitutional amendment. The JIP is focused on an emergency clause that would enhance executive power in a time of crisis. The LDP is going in a different direction, prioritizing electoral system reform in the Upper House. The LDP thinks it will be easier to reach a consensus there on election reforms than on the emergency clause amendment.
As a lawmaker in the conservative bloc, PM Takaichi has presented herself as a firm proponent of the theory of constitutional amendments. “The constitution should occasionally be updated to meet contemporary demands,” said Takaichi to a recent meeting of supporters for constitutional amendment. She did not, however, provide any details on which provisions should be amended adding uncertainty to how the debate should proceed.
