Japan Market Daily — 2026-05-25

Market Snapshot

2 sources

japantimes.co.jp

Nikkei Stock Average tops 65,000 for first time - The Japan Times

japantimes.co.jp

japantimes.co.jp

What Moved the Market

• Iran peace deal optimism crushed oil prices: The primary catalyst was rising expectations of a U.S.-Iran nuclear/peace agreement, which sent crude oil prices sharply lower, reopening hopes around the Strait of Hormuz. Lower energy costs are a direct tailwind for Japan's import-heavy economy and boosted risk appetite in holiday-thinned trading.

• AI-driven tech stocks led the charge: AI-related equities were cited as a key driver of the Nikkei's record-breaking rally, with analysts pointing to continued momentum from the global AI investment boom. Japan's domestic AI infrastructure plays and semiconductor-adjacent names outperformed.

• Holiday-thinned liquidity amplified moves: Hong Kong and South Korean markets were closed for public holidays, and U.S. markets were shut for Memorial Day. Reduced liquidity exaggerated the Nikkei's upward move and limited cross-market hedging.

• Foreign investor inflows continue: A Business Insider analysis published today noted that foreign investors, emboldened by Warren Buffett's continued endorsement and the ongoing AI investment theme, are piling into Japanese equities at a pace not seen since the 1980s bubble era.

Top Movers

Gainers

Losers

Note: Specific individual mover data for May 25 was not fully available in verified research results at publication time. The above reflects sector-level direction confirmed by multiple sources. Readers should verify individual stock data directly on TSE or financial data providers.

Corporate Headlines

Tokio Marine updates FY2026 earnings guidance. Japan's largest non-life insurer Tokio Marine (OTCMKTS: TKOMY) issued updated FY2026 earnings guidance on May 22, providing EPS guidance of ¥2.820, below the analyst consensus of ¥4.130. The revision reflects ongoing recalibration of the firm's profit trajectory amid changing global insurance market conditions.

Japan megabanks post record profits but warn of headwinds. Japan's largest lenders — Sumitomo Mitsui, Mizuho, and Mitsubishi UFJ — posted record profit levels in the most recently reported fiscal year, but analysts caution that maintaining those heights will be challenging. Rising credit costs and elevated geopolitical risk are seen as the primary threats to sustaining the record run. The story broke four days ago and remains relevant to the market narrative.

Business Insider: Japan's stock market comeback deepens. A major feature published today argues that Japan's equity revival is now structural rather than cyclical, supported by the Buffett effect, corporate governance reforms, and the AI supercycle. The piece highlights growing conviction among global institutional investors that the Nikkei's run has further to go.

1 sources

i.insider.com

i.insider.com

BOJ & Macro Watch

• BOJ rate hike expectations mount after FX intervention. Reuters reported on April 30 that Japan's Ministry of Finance intervened in currency markets — the first such intervention in two years — as USD/JPY approached critical levels. Analysts quoted by Reuters stated: "Now that the MoF has drawn a firmer line in the sand for the yen, it is now the turn of the BoJ to reinforce the yen's stability with a rate hike in June." A June BOJ rate decision is now a focal point for markets.

• BOJ held rates in April; dissent grew. The BOJ kept rates steady at its late-April meeting, but notably three board members dissented — a stronger-than-expected signal. The BOJ also revised its fiscal 2026 inflation forecast upward, citing broader pass-through from higher crude oil prices. With oil now falling sharply, the inflation dynamics may shift before the June meeting.

• Yen stability in focus as oil falls. Today's sharp decline in crude prices removes one of the key inflation pass-through pressures that had complicated the BOJ's policy calculus. A weaker oil price environment could give the BOJ more flexibility to communicate a cautious pace of normalization, though the intervention threshold near ¥160/USD remains a hard constraint.

What to Watch Tomorrow

• BOJ policy signals: With markets now pricing in a possible June rate hike, any remarks from BOJ officials or additional data releases (CPI, trade balance) will be scrutinized closely. The interaction between the weaker-oil disinflationary tailwind and underlying wage-price dynamics is the key variable.

• Sustainability of Nikkei rally above 65,000: Analysts at EBC Financial Group caution that maintaining the 65,000 level will require TOPIX breadth improvement beyond AI-sector leadership, plus ongoing resolution of BOJ rate and reform rotation risks. Whether today's close can hold when Hong Kong and South Korean markets reopen will be a critical test.

• Iran deal progress: Any concrete diplomatic developments — or setbacks — in U.S.-Iran negotiations will directly impact oil prices and, by extension, Japanese market sentiment. The holiday-amplified gains today make the market vulnerable to a reversal if peace talks stall.