Japan Election: How a Big LDP Win Could Stabilize Markets

Investors are bracing for Japan's election, but analysts suggest a surprising outcome: a landslide victory for the ruling Liberal Democratic Party (LDP) could be the best news for the country's turbulent bond and currency markets.

The vote has put markets on edge after fiscal worries recently triggered a sharp selloff in both the yen and Japanese government bonds (JGBs). This instability in Japan quickly spread, pushing up borrowing costs from the United States to Germany and reminding global markets of the high debt levels across major economies.

Why a Decisive Victory Could Calm Nerves

Paradoxically, an overwhelming LDP victory may ultimately benefit bonds and the yen. Analysts believe a strong mandate would free Prime Minister Sanae Takaichi from needing to negotiate with opposition parties, many of whom are demanding even deeper tax cuts and more aggressive government spending.

A comfortable majority would also give her more flexibility to respond to market pressure and adjust policies to prevent further yen weakness or a spike in borrowing costs—a pattern she has demonstrated in the past.

According to a recent poll, the LDP and its coalition partner Ishin could secure as many as 300 seats in the 465-seat lower house.

"I don't know if it's going to be a landslide, but certainly Takaichi finds herself in an advantageous situation," said Shoki Omori, chief Japan desk strategist at Mizuho Securities. "That's why she doesn't necessarily need to worry about further ramping up spending... Initially, I think the LDP and Takaichi were a little bit desperate, so to speak."

Takaichi's Policies and Market Turmoil

Since Takaichi—a fiscal dove and follower of former premier Shinzo Abe's "Abenomics"—won the LDP leadership in October, markets have been volatile. JGB yields have soared to all-time highs as bond prices have fallen.

Figure 1: Japanese Government Bond (JGB) yields rose sharply across all maturities under Prime Minister Takaichi, with the January 20 highs (red line) significantly above October 20 levels (blue line), reflecting growing fiscal concerns.

Meanwhile, the yen has fallen to a near 18-month low against the dollar. This has prompted Japanese policymakers to repeatedly threaten market intervention to defend the currency.

Voter Concerns and International Scrutiny

The rising cost of living is a central issue in this election, and voters have increasingly blamed the persistent weakness of the yen for driving up the price of imports. At the same time, rising bond yields translate into higher mortgage rates and increased borrowing costs for businesses, with any debt market rout risking a spillover into Japanese stocks.

The turmoil has also drawn international attention. The United States has criticized the volatility in Japanese markets for its spillover effects and has urged Tokyo to restore stability—a task that could be easier with a large parliamentary majority.

"Although the administration may initially aim to strengthen its proactive fiscal expansion, pressure from the markets and the U.S. administration would compel it to exercise restraint," wrote Barclays analysts led by Shinichiro Kadota. "The reduced need for cooperation with the opposition would also support this shift."

Takaichi has shown a willingness to bend to market pressure. Earlier this week, she walked back campaign comments perceived as favoring a weak yen. In November, she was forced to clarify her fiscal stance after a 21.3 trillion yen ($135.72 billion) stimulus package rattled the bond market.

How Fiscal Pledges Roiled the Bond Market

The so-called super-long bonds have been especially sensitive to any hint of loosened fiscal discipline in Japan, which is already the most indebted nation in the developed world.

On January 20, yields on 30-year bonds surged to a record 3.88% after Takaichi called the election and pledged a two-year suspension of the food tax. She did not specify how she would cover the estimated 10 trillion yen revenue shortfall, spooking investors.

Figure 2: The 30-year JGB yield surged to an all-time peak near 3.9% in late January after a snap election was called, highlighting the market's extreme sensitivity to fiscal policy announcements.

While that selloff could resume, Takaichi's fiscal proposals are starting to look conservative compared to those from the opposition.

A Look at the Opposition's Spending Plans

An analysis of campaign pledges reveals why a strong LDP mandate might lead to more fiscal restraint:

• Takaichi's LDP: Pledged to suspend the 8% food tax for two years.

• Centrist Reform Alliance: Wants to abolish the food tax entirely.

• Democratic Party for the People: Proposes slashing all value-added taxes to 5%.

This context suggests that if Takaichi secures a large majority, she may have the political cover to avoid implementing her most costly promises.

"What the LDP has promised is to 'work on' a reduction of the consumption tax on foods," noted Norihiro Yamaguchi, senior Japan economist at Oxford Economics, implying it is not a firm commitment. "If there is no longer a need to accommodate the opposition's demands, the necessity for doing so naturally diminishes."