Japan votes on Sunday, February 8, and if you believe Polymarket traders, the outcome is already decided. Prime Minister Sanae Takaichi is staying put, and by an overwhelming margin.

What the Numbers Say

Polymarket is assigning Takaichi a 99% chance of remaining Prime Minister after the snap election. The Liberal Democratic Party (LDP) is also pegged at 99% to remain the governing party. But here's where it gets interesting: the Japan Innovation Party (JIP), typically the LDP's coalition partner, sits at just 22%.

That low probability suggests traders think the LDP might not even need coalition support to govern. Translation: Takaichi could have a clear runway to push through her most aggressive policies without the usual legislative compromises.

Policy Continuity Means Big Stimulus and a Weaker Yen

Markets are trading on the assumption that a Takaichi win means more of the same, which in this case means massive fiscal stimulus, continued pressure on the Bank of Japan to keep rates low, and a much tougher national security posture. The yen has been feeling the weight of that expectation, with USD/JPY hovering near the 157 level ahead of the vote.

Trump Weighs In

In a rare move, U.S. President Donald Trump publicly endorsed Takaichi on Truth Social this week. He called her a "strong, powerful, and wise leader" and confirmed he'll be hosting her at the White House on March 19. It's unusual for a U.S. president to wade into a G7 ally's election like this, but Trump apparently sees value in signaling support early.

Defense Stocks Are the Trade

Takaichi's platform is being read as reflationary and security-focused. The Japanese Cabinet has already signed off on a record ¥9.04 trillion ($58 billion) defense budget for fiscal year 2026, and the procurement cycle is now front and center for investors.

On the U.S. side, the usual suspects with Japan exposure include Lockheed Martin Corp (LMT), RTX Corp (RTX), and Northrop Grumman Corp (NOC).

Japanese defense-linked names worth watching include Mitsubishi Heavy Industries (MHVYF), Kawasaki Heavy Industries (KWHIY), and Mitsubishi Electric (MIELY).

The Risk: Fiscal Overreach

Not everyone is bullish. Some analysts are warning about a potential "triple dip" scenario if Takaichi's stimulus program, sometimes called "Sanaenomics," goes too far and undermines fiscal credibility. If investors start worrying that Japan's debt load is becoming unsustainable, the country could face a brutal trifecta: stocks down, bonds down, and the yen breaking past 160. That would destabilize the yen carry trade and create serious volatility across global markets.

For now, though, the market is betting on continuity and defense spending. Sunday's vote will tell us if the prediction markets got it right.