Unlike the past, where economics dictated a strong yen despite loose policy, markets are now driven by politics. The Japanese government is allowing the yen to devalue to manage its debt, even as interest rates rise. This weakens the yen, strengthens the dollar, and could fuel a US equity boom via carry trades.

The election of Sinei Takechi is causing markets to anticipate a more activist fiscal agenda in Japan. This includes inflation relief and strategic investments. Paradoxically, this expectation of fiscal stimulus is simultaneously reducing pressure on the Bank of Japan for near-term interest rate hikes, creating a dual impact on the country's economic outlook.

The Nikkei's strength is not primarily driven by expectations of broad fiscal stimulus. Instead, equity investors are betting on the success of PM Takaichi's targeted policies to boost sentiment and spending among middle and lower-income households. This potential consumption recovery is a key upside catalyst that the market has not fully priced in yet.

Following the last three LDP supermajority victories (2005, 2012, 2014), Japanese markets saw an average 20% gain in the first three months. This initial surge is followed by a multiple expansion over the next nine months, driven by expectations of political stability and increased foreign investment.

The Takaichi government has a political incentive to support the Bank of Japan's monetary normalization. Allowing inflation and yen depreciation to continue unchecked could undermine consumer confidence and her high approval ratings. Therefore, a gradual BOJ rate hike could be seen as a politically astute move to maintain stability and popular support.

The Tokyo Stock Exchange has issued an ultimatum to companies: get your price above book value or be delisted. This is forcing an end to centuries-old practices of corporate cross-ownership and compelling companies to engage in buybacks and other shareholder-friendly actions, providing a powerful catalyst for the market.

Market participants misinterpret PM Takaichi's interventionist stance as a barrier to a Bank of Japan (BOJ) rate hike. However, her top economic priority is fighting inflation. Delaying a hike would accelerate yen depreciation and worsen inflation, making it unlikely she will strongly intervene to prevent a BOJ policy tightening.

Typically, global investors lead rallies in the Japanese equity market. However, the surge following Sanai Takaichi's election saw unusually strong momentum from domestic investors and high public expectation (68% according to one poll). This reversal of the usual pattern suggests a revival of "Abenomics" optimism locally.

Contrary to concerns that a large mandate would embolden populist spending, the scale of Prime Minister Takechi's victory provides political security. This reduces the perceived need for drastic measures like a promised consumption tax cut, reassuring investors in the FX and rates markets about fiscal discipline.