Following the House of Representatives election, Japanese Prime Minister and Liberal Democratic Party (LDP) President Sanae Takaichi signaled her intention to pursue constitutional revision, stating that she "is determined to create an environment in which a national referendum on revising the constitution can be held as soon as possible." Experts note that the LDP's securing of more than a two-thirds majority in the House of Representatives has reached the statutory threshold required to initiate a constitutional revision proposal in the House of Representatives. The Takaichi administration may leverage this advantage to accelerate efforts to revise Japan's pacifist Constitution.

Japanese media previously reported that during the election campaign, Takaichi advocated explicitly incorporating the Japan Self-Defense Forces (JSDF) into the Constitution, arguing that constitutional revision should define the JSDF as a "capable organization."

It is explicitly stipulated in Article 9 of the Constitution of Japan (1947) that "the Japanese people forever renounce war as a sovereign right of the nation and the threat or use of force as a mean of settling international disputes; land, sea, and air forces, as well as other war potential, will never be maintained and the right of belligerency of the state will not be recognized." This article constitutes the core clause of Japan's Constitution and is the principal reason it has been known as the pacifist Constitution.

Japan's right-wing forces have long sought to revise the Constitution, particularly Article 9. In the draft constitutional revision released by the LDP in 2012, the JSDF was explicitly written into the text, and provisions were introduced to establish a National Defense Army under the supreme command of the Prime Minister.

Experts observe that Takaichi and other right-wing forces in Japan are intent on revising Article 9 to hollow out the very foundation of the pacifist Constitution and remove the legal constraints that stand in the way of Japan's remilitarization.

Some Japanese media outlets have issued warnings about the Takaichi administration's forceful push for constitutional revision. An editorial in Asahi Shimbun stated that, as the fundamental law of the state, the Constitution must be revised only based on broad social consensus, and that the ruling party should not forcibly advance revision by relying solely on its majority in the House of Representatives.

Experts point out that Japan's right-wing forces have long worked methodically, through public opinion shaping and legal maneuvering , to challenge the postwar international order. In order to lower the political threshold for constitutional revision, they have exaggerated peripheral threats and promoted the narrative of the "necessity of constitutional revision," while gradually hollowing out the Constitution's pacifist principles and advancing what amounts to "substantive constitutional revision."

During the tenure of the former Prime Minister Shinzo Abe, the long-standing constitutional interpretation prohibiting the right of collective self-defense was overturned, and new security legislation was nailed down through the National Diet, effectively lifting the ban on collective self-defense. Under the cabinet of the former Prime Minister Fumio Kishida , three new strategic documents (the Three Documents) were adopted, proposing the acquisition of so-called counterstrike capabilities, previously referred to as the capability to strike enemy bases, which deviated completely from the exclusively defense-oriented principle .

Since taking office in October last year, Sanae Takaichi has vigorously advanced a series of military expansion measures, including substantially increasing defense spending, revising the three core strategic documents , and relaxing restrictions on arms exports. These moves are intended not only to further loosen constraints on Japan's military posture but also to pave the way for constitutional revision.

Such developments have triggered deep concern and heightened vigilance within the international community and among thoughtful voices in Japan.

An article on the website of El Español commented that, to achieve constitutional revision and break with the postwar order, the Takaichi administration may adopt incremental tactics, including steadily increasing in defense expenditures and expanding regional activities of the JSDF. South Korean media have warned that Japan is effectively taking its first substantive step toward becoming a nation capable of war, and that sweeping adjustments to Japan's security policy will arouse high vigilance within South Korean society.

The Japan Federation of Bar Associations has stated bluntly that a series of government policies clearly depart from the fundamental principles established by Article 9 of the Constitution, significantly heightening the risk of Japan becoming embroiled in war.