Tokyo Holds Above 70,000 After Monday’s 2.4% Surge as AI and 3% JGBs Share the Stage

01 Market Snapshot

Data checked: 2026-10-06 12:00 JST / 2026-10-05 20:00 California time (PDT). October 5 values are final closes. October 6 cash equities are in the lunch break. Reuters had the Nikkei up 0.7% at 10:48 JST; a later public quote showed 70,251.44, about 0.4% higher. Because timestamps differ, neither is labeled the 11:30 first-half close.

02 What Moved Tokyo

Monday’s rally began with weaker U.S. jobs data, which sharply reduced the odds of an October Fed hike and sent money back toward global AI and semiconductor shares. The Nikkei closed up 2.40% at 69,946.86; TOPIX gained 1.33%.

This was not simply a weak-yen move. USD/JPY stayed in the high 157s. High-weight AI names—especially Advantest, Tokyo Electron and SoftBank Group—did a large share of the index work, while banks also rose as 3%-plus JGB yields supported margin expectations.

Tuesday morning extended the move after another record Nasdaq close, Nvidia strength and lower oil, but at a more restrained pace after Monday’s jump.

03 Today’s Market Mover

04 Sector Pulse

05 Yen Watch

USD/JPY was around 157.66 near Monday’s Tokyo close and about 157.9 Tuesday morning. That is continued yen weakness rather than a fresh currency shock.

The level still helps exporters’ translated earnings while raising import costs. Lower crude is cushioning part of the pressure. A decisive move toward 160 would quickly revive intervention risk and the household-inflation debate.

06 Rates / JGB Watch

The 10-year JGB yield ended Monday around 3.09%, close to three-decade highs. The 30-year yield briefly reached a record 4.235% as investors tested the fiscal implications of the Takaichi government’s spending and tax-cut plans.

Tuesday morning the 10-year yield was around 3.105%. The Ministry of Finance opened a new 10-year auction with a 3.1% coupon and about ¥2.6 trillion planned issuance. Bids closed at 11:50 JST; at noon the result was not yet public, so this report does not speculate on it.

07 Global Handoff

After Tokyo closed Monday, the S&P 500 rose 0.66% and the Nasdaq gained 1.05% to a record close. Nvidia added 2.1%.

The contradiction is that U.S. long yields remain high: the 10-year Treasury briefly reached 5.3493%, the highest since 2002. AI optimism is coexisting with bond-market concern over inflation, deficits and term premium. Brent crude fell 1.9% overnight to around $100, a modest positive for energy-importing Japan.

08 Policy / BOJ Watch

Prime Minister Sanae Takaichi used her October 5 policy speech to promise that government-bond issuance would be controlled appropriately while growth investment continues. With 30-year yields at records, the credibility test is occurring in the bond market.

The BOJ raised its policy rate to 1.25% in September; its next meeting is October 29–30. Deputy Governor Shinichi Uchida has argued that the AI boom could affect demand, productivity and the natural rate of interest, linking the equity market’s biggest theme directly to monetary policy.

09 Publisher’s Market Note

Seventy thousand is a powerful headline. The better question is who built it.

On Monday, semiconductors did enormous work. On Tuesday, that story continues—but banks are also benefiting from a Japan in which 3% JGB yields are no longer theoretical. AI and higher domestic rates now sit on the same screen.

10 Before the Next Open

• Results of the October 6 10-year JGB auction and the afternoon yield reaction
• BOJ Governor Kazuo Ueda’s 15:35 JST address to the national securities industry meeting
• Whether the Nikkei holds above 70,000 and TOPIX participation broadens
• Whether USD/JPY breaks decisively above 158
• Whether record U.S. technology shares can coexist with 5.3%-plus Treasury yields tonight