TNS
Japan has handed strong power to Takaichi Sanae after her Liberal Democratic Party won 316 seats, marking a major shift toward assertive economic and security policies. While the U.S. welcomed the move, China and South Korea now face a more decisive but potentially challenging Japan.
Japan’s decisive turn
SEOUL — Japan’s voters have done something they rarely do. They have handed near-unchecked power to a single leader, not out of nostalgia for stability but from impatience with drift.
The result is a Japan that looks more decisive and predictable, yet also more diplomatically challenging for its neighbors, including South Korea.
On Sunday, Prime Minister Sanae Takaichi led the Liberal Democratic Party to a decisive victory of 316 seats in the 465-member House of Representatives. No party in postwar Japan has ever crossed the two-thirds supermajority threshold on its own. A snap election, called just 110 days into her tenure, turned a fragile minority government into a commanding one.
The outcome restores the LDP to a level of control unseen since the 1980s. With coalition partners, the governing bloc now holds close to three-quarters of the chamber and already has enough to override resistance from the upper House of Councillors, where it is in the minority, and dominate the legislative agenda.
This mandate rests on a careful mix of reassurance and rupture. Takaichi offered change without disorder. As Japan’s first female prime minister, she contrasted sharply with the familiar faces of the opposition. Her promise of a “strong Japan” resonated with voters uneasy about economic stagnation and an unforgiving security environment.
Economics did much of the electoral work. “Sanaenomics” departed from the austerity reflex that has long constrained Japanese policy. Takaichi emphasized proactive fiscal spending, industrial investment and a temporary cut to the consumption tax on food.
During the campaign, she spoke far more often about growth than about constitutional revision.
Markets responded quickly. Equities rallied after the vote, while the yen weakened, reflecting expectations of looser fiscal policy and continued resistance to higher interest rates. Investors, like voters, heard a clear signal of direction.
The opposition offered little resistance. A hastily assembled centrist alliance failed to present a coherent alternative or a persuasive leadership team.
Economic pragmatism, however, is only half the story. Takaichi is also Japan’s most assertive security leader in years. Her party now has the numbers to push changes that once seemed politically unreachable.
Formal revision of Article 9 still requires a two-thirds majority in the upper house and a referendum, likely delaying constitutional change until after the 2028 upper house election.
Even so, policies that achieve many of the revision’s aims can move ahead. Defense spending is set to rise beyond 2 percent of GDP. Restrictions on arms exports are likely to ease, alongside plans for a national intelligence agency and revisions to core security documents.
This agenda aligns closely with Washington’s expectations. US President Donald Trump openly welcomed Takaichi’s victory, praising her commitment to “peace through strength.” For the US, a more capable Japan eases the burden of regional deterrence.
For Beijing, a stronger Japan signals friction. China’s rare earth export curbs following Takaichi’s remarks on Taiwan showed how quickly security disputes can spill into economics.
For South Korea, the implications are mixed. A strong Japanese government offers predictability and the capacity to follow through on agreements. President Lee Jae Myung moved quickly to congratulate Takaichi and reaffirm “shuttle diplomacy,” building on their January summit in Nara and plans for cooperation in supply chains and artificial intelligence.
At the same time, Japan’s rightward shift sharpens old sensitivities. Issues such as Yasukuni Shrine visits or the annual Takeshima Day event could quickly chill relations if handled carelessly.
The task for South Korea is challenging but not insurmountable. With Japan’s Takaichi era now a structural reality, the Lee administration must deepen economic and security cooperation where interests align, while maintaining firm boundaries on history and territorial integrity.
Seoul’s strategic agility, not sentiment, will help shape whether Tokyo’s consolidation of power stabilizes the region or entrenches existing frictions.
Credits: TCA, LLC.